Answers
Answer:
a)200 mph
b)80 mph
c)-40 mph
d)97 mph
e)56 mph
(note: i rounded the answer for d, it was a repeating decimal)
Explanation:
a) 3s-0s=3s 600m-0m=600m 600m/3s=200m/s
and it is the same for the rest. Use the explanation for A as a example.
So you take the final variable or speed and subtract it by the starting, then divide that by the time elapsed. Hope this helped!
Related Questions
At the end of the Giant Drop free fall ride, riders experience a large experience a large upward normal force to bring their falling bodies to a stop. Determine the normal force value required to accelerate a 52.1-kg physics student with an upward acceleration of 27.4 m/s/s.
Answers
Newton's second law allows us to find the force applied to the student so that it has an upward acceleration of 27.4 m / s² is:
F = 1.94 10³ N
Newton's second law says that the force is proportional to the product of the mass and the acceleration of the body.
∑ F = m a
Where F is the force, m the mass and the acceleration of the body.
A free body diagram is a diagram of the forces without the details of the bodies, in the attachment we have a free body diagram of the system.
They indicate that the student's mass is 52.1 kg and his acceleration is 27.4 m / s², let's write Newton's second law.
F - W = ma
F = m a + W
Body weight is.
W = mg
F = m (a + g)
We calculate.
F = 52.1 (27.4+ 9.8)
F = 1.94 10³ N
In conclusion using Newton's second law we can find the force applied to the student is:
F = 1.94 10³ N
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Convierte 25 Km/h a m/s
Answers
Answer:
6.94444
Explanation:
Answer:
6.944m/s
Explanation:
[tex]25km/h * \frac{1h}{60min}*\frac{1min}{60s} *\frac{1000m}{1km}[/tex]
[tex]\frac{25km}{1h} * \frac{1h}{60min}*\frac{1min}{60s} *\frac{1000m}{1km}[/tex]
[tex]\frac{25km*1h*1min*1000m}{1h*60min*60seg*1km}[/tex]
[tex]\frac{25*1*1*1000}{1*60*60*1}[/tex]
[tex]\frac{125}{18} = 6.944m/s[/tex]
A non-uniform rod XY of mass 40 kg and length 5.0 m lies on the horizontal ground. Its centre of gravity is 2.0 m from the end X. Calculate the vertical force P, that will just be sufficient to lift the end Y from the ground. Why would the force P, if applied at the end X not be sufficient to lift the end X from the ground? (8 = 10.0 (SC/GCE) ms-2)
Answers
The vertical force P, that will just be sufficient to lift the end Y from the ground is 600 N.
If the force P is applied at end X, it will not be sufficient to lift end X from the ground because the force P is acting downwards.
The sketch of the rod is presented as follows;
|---- 2 ----------|---------------------- 3 ----------------------|
X-----------------------------------------------------------------Y
P ↓
40 kg
Take moment about the center of gravity;
P(2) = 40 x g (3)
2P = 40 x 10 (3)
2P = 1200
P = 600 N
Thus, the vertical force P, that will just be sufficient to lift the end Y from the ground is 600 N.
If the force P is applied at end X, it will not be sufficient to lift end X from the ground because the force P is acting downwards.
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What's a real-life example where you have pushed or pulled on different objects and you noticed a difference in how they moved.
Easy pts! Will give Brainliest too!
Answers
Answer:
Explanation:
Think about hockey for little to no friction if you push on the puck it moves fast and far.
Now imagine taking the same puck and pushing it on gravel or grass it will not have the same motion.
Answer this question fast please
Answers
Answer:
A. Strain
Explanation:
(no explanation)
Please heeelllllppppppppp
Answers
Answer:They repel each other
Step by Step Explanation :
If you bring a positive object near the electroscope, it will attract the electrons toward the terminal. The leaves will move away from each other. You can also use this process with a positive object to charge the electroscope.
Hope this helped!
Hope U have a great day!
If 21.35 divides 12.96.
What’s the answer
Plzzz help me
Answers
Answer:
1.647376
Explanation:
Change the divisor 12.96 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.
We then have the equations:
2135 ÷ 1296 = 1.647376
and therefore:
21.35 ÷ 12.96 = 1.647376
Both calculated to 6 decimal places.
Investigators studying the effect of hitting a soccer ball with the head are using a force plate to look at the forces in ball collisions; the force when the ball hits a player's head will be similar. A 0.43 kg ball is launched at a force plate at 16 m/s. Smoothed data for the force versus time for the collision are shown in (Figure 1).
Answers
The integral of the function of the force applied to the time of application
of the force gives the impulse of the force.
The speed with which the ball rebounds from the plate is approximately
34.23 m/s.
Reasons:
Force = Rate of change of momentum
F × t = m·(v₂ - v₁)
Where;
Speed of the ball, v₁ = 16 m/s
v₂ = The speed with which the ball rebounds from the plate
The impulse, I, of the force is given by the area under the curve.
The height of the triangular curve, h = 2,500 N
The base length of the triangular curve = 7 ms.
Area of a triangle = [tex]\frac{1}{2}[/tex] × Base length × Height
Therefore, we have;
[tex]Area \ under \ the \ curve, \, I = \dfrac{0.007 \times 2500}{2} = 8.75[/tex]
8.75 = 0.48 × (v₂ - 16)
v₂ ≈ 34.23 m/s
Therefore, the speed with which the ball rebounds, v₂ ≈ 34.23 m/s.
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The wave speed is 3 x 10^8 m/s, and the frequency is 4 x 10^8 Hz. Calculate its wavelength.
Answers
Answer:
0.75m
Explanation:
V=FX
3×10^8=4×10^8×X
X= 3×10^8/4×10^8= 0.75m
This car started from rest at a
position of 4 km from the reference
point. It accelerated at 2.2 m/s^2
for a period of 0.5 minutes. How far
from the reference point is the car
located after the acceleration ends?
2 km
5 km
1 km
6 km
Answers
Answer:4.99km
Explanation:
We'll use s for distance, and t for time in seconds.
s = (1/2)at²
t = 0.5 minute*(60sec/1min)=30 sec
s = (1/2)*(2.2m/s²)(30sec)²
s = 990m
Reference point is 4km at start. Distance from reference point is 9km + 0.990km = 4.99km
in which state of matter would you expect to find water on earth surface if the tempature is 25\
Answers
Answer:
Water is a liquid at standard temperature and pressure (25 degrees Celsius and 1 atm, for liquids). Water is is tasteless and odorless.
Explanation:
Use the Pythagorean Theorem to find the velocity of an airplane traveling north at 100 kilometers per hour. It is also flying through a wind that is blowing west at 30 kilometers per hour.
Answers
Answer:
I'm not sure
Explanation:
HAVE FAITH IN UR SELF AND YOU WILL GETT ITTTT HOPEFULLAYY
What is the average speed of the object? What is the average velocity?
Answers
Answer:
Avg speed
[tex] \frac{dp}{dt } = \frac{5 - 4}{12 - 0} = \frac{1}{12} m \: per \: s[/tex]
avg velocity
[tex] \frac{5}{4} m \: per \: s[/tex]
Hi there!
Average speed = Distance / time
From the previous question, distance = 17m, so:
Speed = 17/12 ≈ 1.417 m/s
Average velocity = DISPLACEMENT/ time
Displacement = 1m, so:
Average velocity = 1/12 ≈ 0.083 m/s
If a car accelerates from 0 to 10 m/s in 4 seconds, and the mass of the car is 1500 kg. What force is created by the car?
Answers
Answer:
PLS MARK BRAINLIEST
Explanation:
f=m (v- u)/t
u=0m/s
v=10m/s
t=4 secs
m=1500kg
f=1500(10-0)/4
f=3750N
Phát biểu nào sau đây sai?
A. Hàm lượng cacbon trong thép cao hơn trong gang.
B. Sắt là kim loại màu trắng hơi xám, dẫn nhiệt tốt.
C. Quặng pirit sắt có thành phần chính là FeS2.
D. Sắt (III) hiđroxit là chất rắn, màu nâu đỏ, không tan trong nước.
Answers
Phát biểu nào sau đây sai?
A. Hàm lượng cacbon trong thép cao hơn trong gang.
B. Sắt là kim loại màu trắng hơi xám, dẫn nhiệt tốt.
C. Quặng pirit sắt có thành phần chính là FeS2.
D. Sắt (III) hiđroxit là chất rắn, màu nâu đỏ, không tan trong nước.
ANSWER:D. Sắt (III) hiđroxit là chất rắn, màu nâu đỏ, không tan trong nước.
___________________CARRY ON LEARNING
CAN YOU BRAINLEST ME
HELP HELP HELP HELP
An object has a mass of 3.8 kg and a force of 11.6 N is applied to it. What is the acceleration that results?
Answers
[tex]\\ \sf\longmapsto F=ma[/tex]
[tex]\\ \sf\longmapsto a=\dfrac{F}{m}[/tex]
[tex]\\ \sf\longmapsto a=\dfrac{11.6}{3.8}[/tex]
[tex]\\ \sf\longmapsto a=3.05m/s^2[/tex]
I need the right answer ASAP NO LINKS!!!
Answers
Answer:
Water and power come from external sources.
Explanation:
que es el potencial motor?
Answers
Explanation:
Motor evoked potentials (MEPs) are the electrical signals recorded from the descending motor pathways or from muscles following stimulation of motor pathways within the brain.
Espero eso ayude. Marque como más inteligente.
I'LL MARK YOU BRAINLISTTT!!!!
Answers
Answer:
i think it is c
Explanation:
sorry if im wrong
A car with mass 1750 kg travels on a flat circular track with radius
80.0 m at constant
speed 35.0 m/s. What is the force of friction between the tires and the road enabling the turn?
Answers
Hi there!
On a horizontal circular track with friction, the net force acting in the horizontal direction is:
∑F = Fκ, or the force of kinetic friction.
We know that ΣF = Mv²/r, so:
Mv²/r = Fκ
Plug in the given values to solve:
(1750)(35²)/80 = Fκ
Thus:
Fκ = 26796.875 N
between a smooth and a rough surface, which of the two surfaces is easier to slide and why?
Answers
Answer:
When two surfaces slide against each other, a force called friction makes them stick very slightly together. Smooth surfaces, like ice and glass, are easy to slide over
Explanation:
They create very little friction. Rough surfaces like rock and sand create much more friction, and are easy to grip on to.
Hello There!
Smooth Surfaces are easier to slide over. That's true.
Take an object and slide it across a rough surface. Now, slide the same object across a smooth surface.
What do you see?
I expect you wil find out that smooth surfaces are easier to slide over.
Reason:
Smooth surfaces have less friction than rough ones.
Hope it helps!
Equations for work
W=
F=
D=
Answers
Answer:
W= work
F= force
D= Displacement
Explanation:
Work can be calculated with the equation: Work = Force × Distance.
A car's speed 3 seconds after accelerating from rest at 2 m/s^2 is?
Answers
Answer:
After 3 seconds, the velocity is 4.5+3×1.5=9 m/s.
Safety engineers estimate that an elevator can hold 20 persons of 75kg average mass. The elevator itself has a mass of 500kg. Tensile strength test how the cable supporting the elevator can tolerate a maximum force of 2.96X10^4N. What is the greatest acceleration that the elevators motor can produce without breaking the cable? (show work)
Answers
The greatest acceleration that the elevators motor can produce without breaking the cable is 5 m/s².
The given parameters;
average mass of the 20 persons = 75 kgmass of the elevator, m = 500 kgtensile strength of the elevator, T = 2.96 x 10⁴ NThe total mass the elevator can support;
M = 500 kg + 20(75 kg)
M = 2000 kg
The greatest acceleration that the elevators motor can produce without breaking the cable occurs when the elevator is moving upwards;
T = M(a + g)
[tex]2.96 \times 10^4 = 2000 (a + 9.8)\\\\2.96 \times 10^4 = 2000a + 19600\\\\29600 - 19600 = 2000a\\\\10,000 = 2000a\\\\a = \frac{10,000}{2000} \\\\a = 5 \ m/s^2[/tex]
Thus, the greatest acceleration that the elevators motor can produce without breaking the cable is 5 m/s².
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would be equal to 0 miles.
If you travel from home, to school and back home, the measure of
distance
velocity
displacement
speed
Answers
Answer:
as we know Speed=Distance÷Time
Distance=Speed×Time
Velocity=Displacement÷Time
Displacement=Velocity×Time
u haven't given the speed and all give it and I will tell the answer
Which describes refraction?
the reflection of light as it passes through a substance
the focusing of light as it passes through a substance
the emission of light as it passes through a substance
the bending of light as it passes through a substance
Answers
Answer:
A
Explanation:
Image result for Which describes refraction? the reflection of light as it passes through a substance the focusing of light as it passes through a substance the emission of light as it passes through a substance the bending of light as it passes through a substance
When electromagnetic radiation, in the form of visible light, travels from one substance or medium into another, the light waves may undergo a phenomenon known as refraction, which is manifested by a bending or change in direction of the light.
Help me with this please
Answers
Use the diagram below to answer the Question.
Which convection zone region is shown at point 3?
Question 6 options:
polar region
temperate region
tropical region
Answers
Answer:
Tropical region
Explanation:
because the regions near the equator are called tropical regions
A teacher asks a group of students to use a ruler to measure the amplitude of the wave shown below. Between which of the following points should the amplitude be measured?
A. Points U and Z
B. Points V and X
C. Points W and Y
D. Points X and Z
Answers
Answer:
c for me
Explanation:
I don't think so
if I'm correct if I'm wrong
Answer:
a. points u and z
Explanation:
amplitude, in physics, the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position
write down the relation between energy and power.
Answers
Energy is what makes change happen and can be transferred form one object to another. Energy can also be transformed from one form to another. Power is the rate at which energy is transferred. It is not energy but is often confused with energy.
Energy and power are closely related but are not the same physical quantity. Energy is the ability to cause change; power is the rate energy is moved, or used.