Answer:
A. 0s to 1s
Explanation:
ok bro hav a nise dey
Robert is looking at four galaxies:
an irregular galaxy the he calls "Calliope";
a spiral galaxy that he calls "Medea";
an elliptical galaxy that he calls "Minerva";
and a lenticular galaxy that he calls "Ariadne";
Which of these four is the youngest? A.Medea B.Ariadne C.Minerva D.Calliope
The youngest is Calliope.
What are characteristics of a spiral galaxy?a prominent feature of the spiral arms that make up this flat, spinning disc of stars and interstellar debris.an elliptical galaxy-like stellar bulge with an older star-heavy core region.a star dispersion in the form of a bar.a halo of almost spherical stars, many of which are found in globular clusters.The majority of spiral galaxies have a flat, spinning disk of stars around a central bulge. Older, fainter stars make up the bulge in the center, which is thought to house a supermassive black hole. A bar structure runs through the core of almost two-thirds of spiral galaxies, including the Milky Way.To learn more about : Spiral galaxies
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What advice did the interviewee offer for students interested in his/her career?
The advice the interviewee offered for students interested in his/her career was to be hardworking and persistent.
What is a Career?This is referred to as the chosen profession or occupation of an individual and is characterized by the individual taking the required courses or training which are needed in the execution of the tasks related to it.
The advise which was offered to the students was to be hardworking and persistent as there are lots of challenges and obstacles which one will face on the journey and will help overcome them and achieve the desired result in practicing the career.
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A ball was kicked horizontally off a cliff at 14m / s. how high was the cliff if the ball landed 83 m from the base of the cliff?
The height of the cliff from which the ball fell is 172.3 m.
What is the time of motion of the ball?
The time of motion of the ball is the time taken for the ball to travel from its initial position to the final position.
X = Vt
where;
X is the horizontal distance travelled by the ballV is the horizontal velocity of the ballt is the time of motion of the ballt = X/V
t = (83 m) / (14 m/s)
t = 5.93 s
The height of fall of the ball is calculated as follows;
h = vt + ¹/₂gt²
where;
v is the initial vertical velocity = 0g is acceleration due to gravityh = 0 + ¹/₂gt²
h = ¹/₂gt²
h = ¹/₂(9.8)(5.93)²
h = 172.3 m
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Which of the following does not need to be considered when selecting a bow?
A. Is the bow made by hand?
B. Will you shoot right or left handed?
C. Will the bow be used for target shooting, hunting or both?
D. Can the bow be held without straining?
Answer:
A. Is the bow made by hand?
Explanation:
Hope this helps.
Find the y-component of this
vector:
22.3 m
77.1°
Remember, angles are measured from
the +x axis.
why you cannot use the acceleration equation for an object that changes direction
Answer: The proportionalities expressed by Newton's universal law of gravitation are represented graphically by the following illustration. Observe how the force of gravity is directly proportional to the product of the two masses and inversely proportional to the square of the distance of separation.
Explanation: I hope this helps : )
After the big bang occurred, the universe
a. shrank in size.
b. became denser.
c. became hotter.
d. began to cool.
I
It should be noted that after the big bang occurred, the universe "Became Denser" (Option B)
What is the explanation for this?According to the Big Bang Theory, after the explosion which triggered the transformation of radiation into matter, gravity pulled dark matter together which in turn attracted normal matter.
Hence, it is right given the above analogy that the Universe became denser.
It should be mentioned that the big-bang hypothesis is a widely accepted account of the universe's evolution. Its defining characteristic is the universe's birth from a condition of great heat and density—the so-called big bang, which occurred 13.8 billion years ago.
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9. Twelve identical 2 W light bulbs are connected in series to a 240 V mains supply. The current in ampere through each lamp is (A) 0,05 (B) 0,1 (C) 6 (D) 10
Since they are connected in series, the current in ampere through each lamp will be 0.01 A approximately. None of the options is correct.
What is Electrical Power ?Electrical power is the rate at which electrical work (or electrical energy) is done. It is measured in Watt.
Given that twelve identical 2 W light bulbs are connected in series to a 240 V mains supply. The current in ampere through all the lamp will be the same because they are connected in series.
Power P = IV
Where
P = 2 WV = 240 VI = ?Substitute all the parameters into the formula.
2 = I × 240
I = 2 / 240
I = 0.0083 A
Therefore, the current in ampere through each lamp is 0.0083 A
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a 1160 kg car traveling south at 24.0 m/s with respect to the ground collides with and attaches to a 2590 kg delivery truck traveling east at 16.0 m/s .
V=1160*24S/3750 + 2590*16E/3750 is the final velocity.
How to find the final velocity?Given,
An 1160 kg car traveling south at 24.0 m/s
A 2590 kg delivery truck traveling east at 16.0 m/s gets collided and attached to the car.
Solution:
The momentum is conserved here
1160*24 S + 2590*16 E =(1160+2590)V
V = 1160*24 S + 2590*16 E/3750
V=1160*24S/3750 + 2590*16E/3750
The final velocity is V=1160*24S/3750 + 2590*16E/3750.
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A boat travels north across a river at a velocity of 22 meters/second with respect to the water. the river's velocity is 2.2 meters/second to the east. what is the resultant velocity of the boat, as measured from the land? a. 24.2 meters/second northeast b. 35.5 meters/second north c. 22.1 meters/second northeast d. 28.7 meters/second east
The resultant velocity of the boat would be 22.11 meters/second northeast.
What is Velocity?
Velocity is the overall distance an object travels in a given amount of time.
As stated in the question that A boat crosses a river heading north at a speed of 22 meters per second relative to the water. To get the board's resulting velocity, we should know the river's eastward velocity, which is 2.2 meters per second.
velocity of the river = 2.2 meters/second to the east
velocity of the boat = 22 meters/second
The resultant velocity of the boat = √(22² + 2.2²)
= 22.11 meters/second.
Thus, The boat's final velocity would be 22.11 meter/second towards northeast.
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1. If the odometer on a car reads 100 km at the start and 155 km at the end of a trip, what
distance did the car travel on the trip?
2. What would be the average speed of the car in the question above if the trip took half an
hour (30 minutes)?
1. 55 km is distance the car travel on the trip.
Net distance = final distance - initial distance = 155 - 100 = 55km.
2. 110 km/hr is would be the average speed of the car in the question above if the trip took half an hour.
Average speed = distance travelled/ time = 55km/0.5hr
Hence, average speed = 110km/hr
The average speed is the full distance traveled with the aid of the object in a particular time interval. The average speed is a scalar quantity. it is represented via the significance and does not have path. average pace is calculated by way of dividing distance through time.
Speed is the directional pace of a object in movement as a demonstration of its price of alternate in role as discovered from a selected frame of reference and as measured by way of a particular trendy of time.
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The data below were collected by scientists testing the force of gravity between two objects.
Distance Mass 1 Mass 2 Force
(kg) (kg)
(m)
(N)
0.10
100 150
0.00010
0.10
150
150
0.00015
0.10
100
300 0.00020
0.10
200
200
0.00027
0.10
200
300 0.00040
What do the data in the table support?
OA. The force of gravity between two objects is determined by the object with less mass.
OB. The force of gravity depends on the masses of the objects interacting.
OC.
The force of gravity between two objects is determined by the object with more mass.
D.
The force of gravity only depends on the distance between the objects interacting.
The data table supports that: Option B, "the force of gravity depends on the masses of the objects interacting." is the correct answer.
What is gravity?
Gravity, also sometimes called as gravitation, is the non-changing force of attraction that binds everything together in mechanics. Being the weakest known force in nature, it has little effect on determining the intrinsic properties of common objects.
In the given data table, the distance is same in all five cases, but we can see that the force of gravity is increasing with increase in mass of any one of the object or both of them. We can also understand it as the force of gravity is increasing with the increase in combined mass of both objects.
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Imagine that you are comparing three different ways of having a ball move down through the same height. In which case does the ball reach the bottom with the highest speed?.
When comparing three different ways of having a ball move down through the same height each circumstance, the acceleration varies.
How gravity works on earth ?The Earth's mass is what generates gravity. Your body's mass is affected by the combined gravitational pull of all of its mass. That is what gives you authority. If you were on a planet with a lower mass than Earth, you would also weigh less than you do now.
Every object in the universe that has mass is drawn to every other object, regardless of their size or location. Gravity exists whether you are on the Moon, the Earth, or far out in space. Gravity does not require air or an atmosphere to operate.
Acceleration due to gravity :The acceleration of a body brought on by the force of the earth's gravitational field is known as the acceleration due to gravity, or simply g. This force can be expressed mathematically as mg, where m is the body mass.
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Find the final velocity of the particle if it is initially moving along the x-axis with a velocity of −1.85 m/s
Although part of your question is missing, the complete question is "Find the final velocity of the particle if it is initially moving along the x-axis with a velocity of −1.85 m/s. The force shown in the force-time graph acts on a 2.4kg object."
The final velocity of the particle is 1.43 m/s.
The impulse of force is the product of the resultant force and duration of time under the impulse-momentum theorem.
Δρ = ΔF + Δ t = area under F-t curve.
area = area of rectangle + area of triangle( 1/2 base ×height )
∴ area = (2× 3) + 1/2 (2×2) = 8 N
To find the final velocity, Δρ = mass × Δvelocity
let the final velocity be v'
∴ 8 = 2.4 × ( v' - (-1.85))
2.4v' = 8- 4.44
v' = 1.43 m/s.
Hence the final velocity of the particle is 1.43 m/s.
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A bicycle moves at an initial velocity of 5m/s accelerating constantly at 2.5m/s^2, what would be the displacement of the bicycle after 6.5 seconds?
The displacement of the bicycle is 85.3125m
Displacement of the bicycle may be defined as the change in position of the bicycle. It is a vector quantity so that it has direction and magnitude.
We are given that,
The initial velocity of the bicycle = u = 5m/s
The acceleration of the bicycle is = a = 2.5 m/s²
The time taken by the bicycle = t = 6.5 seconds
Therefore, to get the value of displacement of the bicycle by the equation of motion which is written as,
S = ut + (1/2) at²
Where, S is displacement, u is initial velocity, a is acceleration and t is time taken by the bicycle.
Since , putting the values in above equation then we get,
S = {5m/s × 6.5sec} +{ (1/2) × 2.5m/s² × (6.5 sec)²}
S = 32.5 m + 52.8125m
S = 85.3125m
Therefore, the bicycle would be moves 85.3125m
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A simple machine is a machine that does work with only |two movements| of the machine
true or false
If false write the true answer
Answer:
hope it helps
Explanation:
a parallel-plate capacitor has the volume between its plates filled with plastic with dielectric constant k. the magnitude of the charge on each plate is q. each plate has area a, and the distance between the plates is d. for related problemsolving tips and strategies, you may want to view a video tutor solution of a spherical capacitor with dielectric.
The Electric Field of the capacitor is given by E = q/kaε, Voltage is given by V = qd/kaε and the capacitance is given by kaε/d.
The magnitude of charge on each plate is given by q, area between the plates is given by a, dielectric constant is given by k, distance between the plates is d. The area of the enclosed charge 'a' is given by
q(enclosed) = σa(q/a)a, where σ is surface charge density given by q/a.
Now, according to gauss law, E = q/kaε.
Since, voltage = Electric field × Distance
V = E×d
V = (q/kaε)×d
V = qd/kaε
Now, the capacitance = Charge/Voltage
C = q/V
C = q/(qd/kaε)
C = kaε/d.
Thus, the value of Electric Field, Voltage and Capacitance are E = q/kaε, V = qd/kaε and C = kaε/d respectively.
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Complete Question
A parallel-plate capacitor has the volume between its plates filled with plastic with dielectric constant K. The magnitude of the charge on each plate is Q. Each plate has area A, and the distance between the plates is d.1. Use Gauss's law to calculate the magnitude of the electric field in the dielectric.2. Express your answer in terms of the given quantities and appropriate constants.3. Use the electric field determined in part A to calculate the potential difference between the two plates.4. Express your answer in terms of the given quantities and appropriate constants. Use the result of part B to determine the capacitance of the capacitor.5. Express your answer in terms of the given quantities and appropriate constants.
When we rolled carts down a ramp, we measured the length of the ramp, the height of the lower part of the ramp, the height of the upper part of the ramp, and how long it took for the cart to reach the bottom of the ramp. Then we changed the height of the upper part of the ramp and measured how long it took for the cart to reach the bottom of the ramp.
Which variable was the Independent Variable in that situation?
How do you know it's the Independent Variable?
The force of gravity can more easily overcome the force of friction if the ramp is steep. Obviously, gravity causes an object on an incline to move faster down the slope than an object on a flat slope. Because of the increased height, falling takes longer.
What exactly is an independent variable?In mathematical modeling, statistical modeling, and experimental sciences, dependent and independent variables are variables. Dependent variables are so named because their values are studied in an experiment under the assumption or demand that they are dependent on the values of other variables due to some law or rule. In research, the best way to identify dependent and independent variables is to use the sentence "The Independent variable causes a change in the Dependent variable.Multiple independent variables are frequently included in experiments by researchers. The factorial design is the most common approach, in which each level of one independent variable is combined with each level of the others to generate all possible conditions.Hence, The force of gravity can more easily overcome the force of friction if the ramp is steep.
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A 1.4-kg physics textbook is initially at rest on a steel table. The textbook is then pushed with a constant force of 6.0 N. Friction with a magnitude of 3.0 N is exerted on the moving book by the surface of the table. Determine the final velocity of the textbook after it has been pushed 1.0 meter across the table.
The final velocity of textbook upon being pushed is 0.64 m/s. Thus, [tex]v_{f} = 0.64 m/s[/tex].
Given mass of the textbook, m = 1.4 kg
External force applied to push textbook, F = 6.0 N
Frictional force exerted on book, f = 3.0 N
Initial velocity of textbook, u = 0
Since, The external force applied on the object is more than the total limiting friction exerted on book. Hence, the object moves and friction become Kinetic Friction.
Therefore, F-f = ma
6 - 3 = 1.4 * a
[tex]a= \frac{3}{1.4}[/tex]
[tex]a = 2.1 m/s^{2}[/tex]
Now, to find final velocity of textbook
[tex]v^{2} = u^{2} + 2as[/tex]
where v = final velocity
u = initial velocity
a = acceleration
s = distance travelled by textbook
[tex]v^{2} = 0 + 2*2.1*0.1[/tex]
[tex]v^{2} = 0.42[/tex]
v = 0.64 m/s
Hence, Final velocity of textbook after crossing 1.0m of distance is 0.64m/s.
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what force does a trampoline have to apply to a 45.0-kg gymnast to accelerate her straight up at 7.50 m/s2 ? note that the answer is independent of the velocity of the gymnast—she can be moving either up or down, or be stationary.
The force required will be 337.5 N
We have given the mass of the gymnast m = 45 kg
We have to find the force applied to the gymnast so that he can accelerate with the acceleration of 7.50m/sec^2
According to newtons law force on any object is given by F = ma, where m is mass and a is acceleration
So the force on the gymnast will be equal to F = 45×7.50 337.50 N
For acceleration of 7.50m/sec^2, we have to apply a force of 337.5 N
Acceleration is defined in mechanics as the rate of change of an object's velocity with respect to time. The orientation of an object's net force determines the orientation of its acceleration. Newton's Second Law states that the magnitude of an object's acceleration is the result of two causes:
the net balance of all external forces acting on that object — the magnitude of this net resulting force is related to its sizeThe magnitude is inversely related to the mass, depending on the materials used to make the thing.The rate of acceleration is expressed in meters per second squared.
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Describe how the womans nervous system coordinates the reflex action
The nervous system in a woman can coordinate the reflex action due skin receptors sense a stimulus, sensory neurons transmits the electrical impulses, motor neurons address it to the effect, and finally producing a response.
What is the reflex action?Reflex action can be defined as an involuntary response to different environmental conditions, which are collectively called stimuli. These conditions may lead to a change in the body temperature and they are useful to adapt to a changing environment, which is a fundamental issue in adaptive responses.
The nervous system may manage reflex actions in this system by using specific cell receptors located at the epidermis (skin cells).
Therefore, we can conclude that the reflex action is a coordinated response of the nervous system associated with the detection of environmental stimuli that lead to the activation of effector cells and sensory neurons.
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URGENT!! ILL GIVE
BRAINLIEST! AND 100 POINTS
A liquid has a mass of 25 grams (g) and a volume of 10 milliliters (mL). What is the density of the liquid?
A. 4.0 g/ml
B. 0.4 g/ml
C. 2.5 g/ml
D. 250 g/ml
Answer:
C. 2.5 g/ml
Explanation:
Divide mass by volume
find the ratio of the masses m1/m2 . express your answer in terms of some or all of the variables a , μ , and θ , as well as the magnitude of the free-fall acceleration g .
The ratio of the masses is m1/m2.In terms of some or all of the variables a, μ, and θ, as well as the magnitude of the free-fall acceleration g.
m1/m2 = a+g(sinθ+μcosθ)/g−a
Acceleration describes the speed and direction changes in velocity over time. Acceleration refers to the change in speed or direction of an item or points traveling straight forward. Due to the constant change in direction, motion on a circle accelerates even while the speed is constant.
To be a vector quantity, acceleration must have both a magnitude and a direction. As a vector quantity, velocity is also. A time interval's velocity vector change divided by that interval's duration is the definition of acceleration. The limit of the ratio of the change in velocity over a certain period to that period as that period approaches zero is used to determine instantaneous acceleration.
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Salmon often jump waterfalls to reach their
breeding grounds.
Starting downstream, 1.54 m away from a
waterfall 0.643 m in height, at what minimum
speed must a salmon jumping at an angle of
35.5° leave the water to continue upstream?
The acceleration due to gravity is 9.81 m/s².
Answer in units of m/s.
The minimum speed that a salmon jumps at an angle of 35.5 degree is 43.3 m/s to leave the water to continue upstream.
What is speed and how it calculated out to be 43.3 m/s ?
First draw the picture of initial velocity , Looking at the x direction x = vxt but vx= vcos 35.4 degree, so x = vcos(31.4 degree) .t= 2.73/ vcos(35.4 deg) is the time to reach and continue to upstream, given acceleration due to gravity 9.8m/s^2.In the y direction del y = Vyt + 1/2 at^2 but Vyi = Vsin(35.4 deg) (2.73/vcos(31.4 deg).So using the equation V^2 = 43.1765 or we can get the final answer as 43.3 m/s to be the speed that the salmon jumps at angle of 35.5 degree leave the water to continue upstream.Speed is a quantity which represents distance per unit time.To know more about speed visit:
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calculate the 76- kg pilot's effective weight (the force with which the seat pushes up on him) at the bottom of the circle, and at the top of the circle (assume the same speed).
The minimum radius of the circle is 5249m
The 76kg pilot's effective weight at the bottom of the circle is 5214N
The pilot's effective weight at the top the circle is 3724N
Here's the complete question:
a jet pilot takes his aircraft in a vertical loop.
a) if the jet is moving at a speed of 2000 km/h at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.0g's
b) calculate also the 76kg pilot's effective weight ( the force with which the seat pushes up on him) at the bottom of the circle.
c) calculate the pilot's effective weight at the top the circle. (Assume the same speed.)
a) To determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.0g's.
v =2000 km/h
v = 2000/3.6 m/s
v = 555.6 m/s
centripetal acceleration, a
a = v²/r
Therefore
6g = v²/r
r = v²/(6g)
r =555.6²/(6*9.8)
r = 5249 m
b) The 76kg pilot's effective weight at the bottom of the circle
76*(6g + g) = 76*7*9.8 = 5214 N
c) The pilot's effective weight at the top the circle.
76*(6g-g) = 76*5*9.8 = 3724 N
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The figure shows a steady electric current passing through a wire with a narrow region. What happens to the drift velocity of the moving charges as they go from region a to region b and then to region c ?.
The drift velocity increases from A to B and decreases from B to C.
A drift velocity in physics is the average speed that charged particles—like electrons—achieve within a material as a result of an electric field. An electron will typically move randomly across a conductor at the Fermi velocity, producing an average velocity of zero. Applying an electric field causes a little net flow in one direction to be added to this random motion; this is the drift. Free electrons gain velocity in the direction opposite the electric field between collisions when a potential difference is applied across a conductor (and lose velocity when moving in the direction of the field), acquiring a velocity component in that direction in addition to their random thermal velocity.
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please answer this question! i am new to physics and i need help please. thanks!!!
Numerous optical devices, including telescopes, microscopes, binoculars, spectroscopes, and periscopes, among others, employ the phenomenon of complete internal reflection of light.
A diamond's brilliance results from complete internal reflection.
Why is it crucial to fully reflect within?Total internal reflection, which is used in polarising prisms, is significant in fibre optics. Portion of the incoming light will be transmitted and part will be reflected at any incidence angle below the critical angle. The indices of refraction can be used to compute the normal incidence reflection coefficient.
Total internal reflection is a widely used technique in fibre optics. It is used in communications to carry cable TV, internet, and telephone signals. The use of light transmission through fibres is known as fibre optics.
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how do Mars’s surface and atmosphere differ from Earth’s?
Answer:Mars is about half the size of Earth by diameter and has a much thinner atmosphere, with an atmospheric volume less than 1% of Earth's. The atmospheric composition is also significantly different: primarily carbon dioxide-based, while Earth's is rich in nitrogen and oxygen.
Explanation:
Answer:The atmosphere of Mars is much thinner than Earth's. The average surface pressure is only about 610 pascals (0.088 psi) which is less than 1% of the Earth's value. The currently thin Martian atmosphere prohibits the existence of liquid water at the surface of Mars, but many studies suggest that the Martian atmosphere was much thicker in the past.
Explanation:
a 1.45 kg falcon catches a 0.159 kg dove from behind in midair. what is their velocity (in m/s) after impact if the falcon's velocity is initially 23.4 m/s and the dove's velocity is 9.33 m/s in the same direction? (enter the magnitude.)
The velocity of the falcon and dove in m/s after the impact is 21.95 m/s.
Using the data given,
Mass of falcon m₁ = 1.45kg
Mass of dove m₂ = 0.159kg
Initial speed of the falcon x₁ = 23.4m/s
Initial speed of the dove, x₂ = 9.3m/s
It is necessary to find the final velocity after the impact. When the falcon catches the dove, it will becomes the case of inelastic collision. The conservation of momentum will be :
m₁x₁ + m₂x₂ = (m₁ + m₂)V
V = m₁x₁ + m₂x₂/(m₁ + m₂)
V = 1.45*23.4 + 0.159*9.33/1.45+0.159
V = 33.93 + 1.483/1.613
V = 35.413/1.613
V = 21.95
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a rabbit is moving in the positive x-direction at 1.50 m/s when it spots a predator and accelerates to a velocity of 10.9 m/s along the negative y-axis, all in 1.80 s. determine the x-component and the y-component of the rabbit's acceleration. (enter your answers in m/s2. indicate the direction with the signs of your answers.)
x-component of the rabbit's acceleration ax = -0.833m/s
y-component of the rabbit's acceleration ay = -6.06m/s
How does acceleration work?Acceleration is the rate of change in both speed and direction of velocity over time. When anything moves faster or slower in a straight line, it is said to have been accelerated. Because the direction is always shifting, motion on a circle accelerates even while the speed is constant.
Along x axis
Vox = velocity along the positive x-direction = 1.50 m/s
Vfx = 0m/s
ax = (Vfx-Vox)/T
ax=(0-1.5)/(1.8)
ax=-0.833m/s
x-component of the rabbit's acceleration ax = -0.833m/s
Along y axis
Voy = 0 m/s
Vfy = velocity along the negative y-axis -10.9m/s
ay=(Vfy-Voy)/T
ay= (-10.9-0)/(1.8)
ay = -6.06m/s
y-component of the rabbit's acceleration ay = -6.06m/s
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