Explanation:
This problem is on the motion of a car.
given data.
acceleration a=7.55m/s
time t= 4.25 sec
1. Determine the final velocity of the car.
we know that
acceleration= velocity/time
substituting our given data we have
7.55= v/4.25
v=7.55*4.25
v=32.08m/s
2. calculate the cars displacement.
we also know that
velocity= distance/time
distance= velocity*time
distance= 32.04*4.25
distance= 136.37m
A ball thrown vertically upward is caught by the thrower after 4.00 sec. Find the initial velocity of the ball and the maximum height it reaches.
Answer:
Initial velocity = 39.2m/s
Maximum height is 78.4m
Explanation:
Given
[tex]Time, t = 4s[/tex]
Solving (a): Initial Velocity
Using first law of motion:
[tex]v = u + at[/tex]
Where
[tex]v = final\ velocity = 0[/tex]
[tex]u = iniital\ velocity = ??[/tex]
[tex]a = acceleration = -g[/tex] [g represents acceleration due to gravity]
[tex]t = 4[/tex]
Substitute these value in the above formula:
[tex]v = u + at[/tex]
[tex]0 = u - g * 4[/tex]
[tex]0 = u - 9.8 * 4[/tex]
Take g as 9.8m/s²
[tex]0 = u - 39.2[/tex]
[tex]u = 39.2m/s\\[/tex]
Hence, initial velocity = 39.2m/s
Solving (b): Maximum Height
This will be solved using second equation of motion
[tex]s = ut + \frac{1}{2}at^2[/tex]
This becomes
[tex]s = ut - \frac{1}{2}gt^2[/tex]
Substitute values for u, t and g
[tex]s = 39.2 * 4 - \frac{1}{2} * 9.8 * 4^2[/tex]
[tex]s = 156.8 - 78.4[/tex]
[tex]s = 78.4[/tex]
Hence, the maximum height is 78.4m
A country is experiencing economic problems. Many people are unemployed,
and businesses have been making risky investments. The government
decides to start more programs to help poor citizens find jobs, and to regulate
corporate behavior.
This situation best reflects the influence of which economic thinker?
This situation best reflects the influence of which economic thinker is John Maynard Keynes
The following information should be considered:
Keynes's theory was increased in the government expenditures and lower the taxes that stimulated demand.Also, it should pull the economy out of a depression.Learn more: https://brainly.com/question/5763151?referrer=searchResults
hey can anyone help me out in dis pls!
Answer:
D
Explanation:
Answer:
B
Explanation:
increasing the waters temperature
A soccer player kicks a ball horizontally at 25.0 m/s from a bridge, and the ball hits
the ground after 1.5 s.
2
How high is the bridge?
Answer: 11.025 meters.
Explanation:
Ok, we know that the initial velocity is only horizontal, so it does not affect the vertical problem.
Looking only at the vertical problem (because we want to know how high is the bridge) we have that:
The acceleration is the gravitational acceleration, g = 9.8m/s^2
A(t) = -9.8m/s^2
Where the negative sign is because this acceleration is downwards.
For the vertical velocity we integrate over time, as we do not have an initial vertical velocity, there is no constant of integration.
V(t) = (-9.8m/s^2)*t
For the position we integrate over time again, here the constant of integration is the initial vertical position, H, that is the height of the bridge.
P(t) = 0.5* (-9.8m/s^2)*t^2 + H.
Now we know that the ball hits the ground 1.5s after it was kicked, then:
p(1.5s) = 0m
With that we can find the value of H.
0 = 0.5* (-9.8m/s^2)*(1.5s)^2 + H.
H = 0.5*(9.8m/s^2)*(1.5s)^2 = 11.025m
Which of the following examples describe an acceleration? (Check ALL that APPLY)
Group of answer choices
A car has to slow down as it approaches a slower truck in front of it
A car is sitting in a parking lot
A car maintains a speed of 15 mph as it turns around a corner
A car is stopped at a stop light, and speeds up when it turns green
A car drives straight down a road at 60 mph
Answer:#3,#4,#5
Explanation:they each don't stop
Why is it important that a satellite in orbit be above the earth's
atmosphere?
Explanation:
A stone is thrown upward neglecting air resistance. ... Why is it important that a satellite remain above Earth's atmosphere? The air resistance will slow it down and burn it. What happens to a satellite close to Earth's surface if it is given a speed exceeding 11.2 km/s?
Which part of an amino acid's basic structure gives it its unique functional characteristics? Choose 1 answer: А R-group B Central alpha (a) carbon Carboxyl group (-COOH) Amino group (-NH2)
Answer:
A. R- group
Explanation:
The part of an amino acid's basic structure gives it its unique functional characteristics is R-group.
What is amino acids?Amino acids are smaller molecules that join or combine together through peptide bond to form protein. They are refer to the building block of protein.
Therefore, The part of an amino acid's basic structure gives it its unique functional characteristics is R-group.
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An airplane accelerates down a runway at 3.10m/s^2 for 41.5 seconds from rest until it finally lifts off the ground . What is the displacement before take off
Answer:1720m
Explanation:
Uh
Can a platform be in equilibrium if the two upward forces are equal to each other?
Answer:
Equilibrium is a state of consistency. An object under the influence of just one force cannot be equal. Only when there is no force at all, or when two or more forces meet zero, can the object have equilibrium.
Explanation:
Someone please help me to answer this questions...
Answer:
a.25J
Explanation:
m=0.5kg
g=10
h=5
potential energy=m×g×h
=0.5×10×5
=25J
A boy wants use his slingshot to shoot a water balloon into the air. His
slingshot has a spring constant of 60 N/m, and he pulls it back 1.5 m before
releasing the water balloon and launching it into the air. If air resistance can
be ignored and the water balloon has a mass of 0.5 kg, what is the
approximate maximum height that the water balloon can reach? (Recall that g
= 9.8 m/s2)
O A. 7.0 m
B. 4.6 m
C. 9.3 m
D. 13.8 m
Answer:
A. 70 m OS the correct one
The approximate maximum height that the water balloon can reach is 13.8 m, The correct option is D.
What is the conservation of energy?Conservation of energy is a fundamental principle in physics that states that energy cannot be created or destroyed, only transformed or transferred from one form to another. In other words, the total amount of energy in a closed system remains constant over time. This principle is based on the idea that energy is a fundamental property of the universe, and it is a key concept in many areas of science, including physics, chemistry, and engineering. The law of conservation of energy is used to analyze and understand a wide range of physical phenomena, from the behavior of subatomic particles to the workings of the entire universe.
Here in the Question,
The maximum height that the water balloon can reach can be found using conservation of energy. The initial potential energy stored in the slingshot is transformed into kinetic energy of the water balloon as it is launched into the air, and then into potential energy at the maximum height.
The initial potential energy of the slingshot is given by:
PE = (1/2)kx^2
where k is the spring constant (60 N/m) and x is the distance pulled back (1.5 m)
PE = (1/2)(60 N/m)(1.5 m)^2
PE = 67.5 J
At the maximum height, all of the initial potential energy is converted into potential energy due to gravity:
PE = mgh
where m is the mass of the water balloon (0.5 kg), g is the acceleration due to gravity (9.8 m/s^2), and h is the maximum height.
h = PE/(mg)
h = 67.5 J/(0.5 kg)(9.8 m/s^2)
h ≈ 13.8 m
Therefore, the approximate maximum height that the water balloon can reach is 13.8 m, which is option D.
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A monorail starts from rest and accelerates at a rate of 2.2m/s2 for 10s.Then it runs at a constant speed for 74s and then slows down at a rate of 1.5m/s2
Answer:
d = 4217 m
Explanation:
Case 1.
Initial velocity, u = 0
Acceleration, a = 2.2 m/s²
Let d₁ is the distance in case 1. Using second equation of motion as follows :
[tex]d_1=ut+\dfrac{1}{2}a_1t_1^2\\\\\text{Here, u =0}\\\\d_1=\dfrac{1}{2}\times 2.2\times 10^2\\\\d_1=110\ m[/tex]
Let d₂ in the distance in case 2. Using second equation of motion as follows :
[tex]d_2=ut+\dfrac{1}{2}a_2t_2^2\\\\\text{Here, u =0}\\\\d_2=\dfrac{1}{2}\times 1.5\times 74^2\\\\d_2=4107\ m[/tex]
Total distance,
D = d₁ + d₂
D = 110 + 4107
D = 4217 m
Hence, the total distance covered is 4217 m.
A car accelerates at 3 m/s*2. Assuming the car starts from rest, how much time does it need to
accelerate to a speed of 12 m/s?
3 sec
2 sec
4 sec
12 sec
None of the other answers
Acceleration,a = 3 m/s²
Initial velocity,u = 0 m/s
Final velocity,v = 12 m/s
To be calculated:-Calculate the time take by a car.
Solution:-According to the first equation of motion:
v = u + at
★ Substituting the values in the above formula,we get:
⇒ 12 = 0 + 3 × t
⇒ 12 = 3t
⇒ 3t = 12
⇒ t = 12/3
⇒ t = 4 sec
We are given with some parameters used in Kinematics for determining the motion of an object.
Accleration = 3 m/s²Started from rest (Initial vel.) = 0 m/sFinal velocity = 12 m/sWe have to find the time taken by the car to attain the final velocity with the given accleration. By using 1st equation of motion which says:
v = u + atFinal velocity = Initial velocity + Accl. × Time taken
Plugging the values,
➝ 12 = 0 + 3(t)
➝ 3t = 12
➝ t = 4 s
So, the correct answer is Option C. And we are done...
Carry On Learning [tex]![/tex]
The table shows results of an experiment that was replicated. Which best describes the data? They are neither precise nor reproducible. They are precise but not reproducible. They are accurate and reproducible. They are accurate but not reproducible.
Answer:
They are accurate and reproducible.
Explanation:
Answer:
They are precise and reproducible.
Explanation:I just took the test on Edgenuity
In need of help!!!!!!
Answer:
b
Explanation:
because it fly and you need for it to drop at the right spot for them to get it
Is velocity constant in uniform motion?
The Direction of the Velocity Vector
Objects moving in uniform circular motion will have a constant speed. Velocity, being a vector, has both a magnitude and a direction. The magnitude of the velocity vector is the instantaneous speed of the object.
in general, as the human population increases which of the following is true? OA The amoum of habitat destroyed by people decreases OB. The sound of clean water available for use increases. OC. The amount of waste produced by people decreases D. The amount of resources used by people increases
A ball rolling down a hill was displaced 21.9 m while uniformly accelerating from rest. If the final velocity was 7.14 m/s, what was the rate of acceleration?
Answer:
a = 1.16 m/s²
Explanation:
In order to find the acceleration of the ball we will use 3rd equation of motion.
2as = Vf² - Vi²
where,
a = acceleration = ?
s = displacement = 21.9 m
Vf = Final Velocity = 7.14 m/s
Vi = Initial Velocity = 0 m/s (Since, ball starts from rest)
Therefore, using the values, we get:
2a(21.9 m) = (7.14 m/s)² - (0 m/s)²
a = (50.97 m²/s²)/(43.8 m)
a = 1.16 m/s²
3. A body has an initial velocity of 4.0m/s. After 6.0s, the velocity is 12.0m/s. Determine the displacement of the body in the 6.0s. (Δs = 0.5(u + v)t
In this section please include the if then statements you develop during your lab activity these statement reflect your predicted outcomes for the experience
Answer:
but for which activity donu need the answer and mention the question clearly
The 500 pages of a book have a mass of 2.50 kg. What is the mass of each page A in kg B in mg?
Answer:
A.
Mass per page = mass of book / number of pages
Mass per page = 2.5kg / 500 pages = 0.005kg
B.
Mass per page = mass of book / number of pages
Total mass = 2.5kg = 2,500grams = 2,500,000mili grams
Mass per page = 2500000mg / 500 pages = 5000mg
What is the average velocity of an object that moves from 7.3 cm to 4.1 cm relative to the origin in 2.5 s
PLEASE HELP ME I DONT WANT TO FAIL
Answer:1 7/25
Explanation:take the total distance7.3-4.1 then divide by the total time taken
The average velocity of the object is equal to -1.28m/s relative to the origin when it moves for 2.4 seconds.
What is average velocity?Average velocity is a vector quantity and is defined as the change in position (∆x) divided by the time intervals (∆t) in which it occurs. The average velocity can be positive or negative and the S.I. unit of average velocity is m/s.
The average velocity of an object = ∆x/∆t
The average velocity of an object involves only the displacement of the object. However, the magnitude of the displacement of an object can be different from the actual path length.
Given, the displacement of the object = final position - initial position
∆x = 4.1 - 7.3 = -3.2m
The time, ∆t = 2.5 - 0 = 2.5 s
The average velocity of the object = ∆x/∆t = -3.2/2.5 = -1.28 m/s
Therefore, the average velocity of the object is -1/28 m/s relative to origin.
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what is 237 seconds converted to meters
Answer:
You can not convert from seconds to meters.
Answer:
yeah you can't convert it
Describe how an adult can teach a child to become a racist or bigot using positive reinforcement and negative punishment. Make sure you define the terms and apply the term to a real world example.
Answer:
by raising them in an environment in wich it is common and giving false information about other races to install bad stereo types and distrust in the child who will grow up to not know any better do to the dumb ignorant parent raised the same way
Explanation:
?????? thats all i got im not a politician BLM
How does distance affect gravity???
Answer:no because distance is weaker than gravity
Explanation:the strenght of the gravita force between the two objects depend on two facto mass and distance the force of gravity the masses exert on each other increases the force of gravity decreases if the distance is doubled the force of gravity is one fourth as strong as before
1. A gas has a volume of 300 mL at 40 kPa of pressure. What will its volume be if the pressure is changed
to 80 kPa?
How to work it out?
Answer:
V₂ = 150 mL
Explanation:
Given that,
Initial volume of a gas, [tex]V_1=300\ mL[/tex]
Initial pressure, [tex]P_1=40\ kPa[/tex]
We need to find the volume of gas if the pressure is changed to 80 kPa. Boyle's law states that the relationship between pressure and volume is inverse. Mathematically,
[tex]P_1V_1=P_2V_2[/tex]
[tex]V_2=\dfrac{P_1V_1}{P_2}\\\\V_2=\dfrac{300\times 40}{80}\\\\V_2=150\ mL[/tex]
So, the new volume is 150 mL.
Convert 540 cg= ____ Hg
A positively charged atom has
Answer:
Lost electrons
Explanation:
For a atom to become positively charged it needs to have more protons than electrons
What does amu represent?
hey can anyone help me out in dis pls!
Answer:
A is true ,b is true
Explanation: