Answers350CR Integrated ScienceKinetic Energy

Kinetic Energy Answers

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Which best summarizes a concept related to the work-energy theorem?

A
When work is positive, the environment does work on an object.
B
When work is negative, the environment does work on an object.
C
When work is positive, the kinetic energy in a system remains constant.
D
When work is negative, the kinetic energy in a system remains constant.
3

What is the kinetic energy of a 620.0 kg roller coaster moving with a velocity of 9.00 m/s? Round to 3 significant figures.

A
2,790 J
B
5,580 J
C
25,100 J
D
50,200 J
5

A 20.0 kg object is at rest, and then speeds up to 16.0 m/s. How much work was done on this system?

A
320 J
B
2,560 J
C
2,880 J
D
5,120 J
6

Four vehicles are traveling on the same road. Which vehicle most likely has the greatest kinetic energy?

A
a compact car traveling at a velocity of 10 m/s
B
a pickup truck traveling at a velocity of 25 m/s
C
a minivan traveling at a velocity of 10 m/s
D
a motorcycle traveling at a velocity of 25 m/s
7

The diagram shows a side view of a skateboard ramp.

Question illustration
A
W and X
B
X and Y
C
Y and Z
D
W and Z
10

If all else is constant, which would cause the greatest increase in kinetic energy of a moving object?

A
Mass and velocity are each reduced by one-half.
B
Mass is reduced by one-half, and velocity is doubled.
C
Mass is doubled, and velocity is reduced by one-half.
D
Mass and velocity are each doubled.
11

Which object has the least amount of kinetic energy?

A
A picture of a spinning top.
Option A
B
A picture of a golf ball on a grass covered hill in sunlight.
Option B
C
A picture of a person filling a glass of water from the faucet to overflowing.
Option C
D
A picture of a roller coaster train half way down the first hill of a roller coaster track.
Option D
12

According to the work-energy theorem, the amount of work done can be determined using which formula?

A
W = KE =
Option A
B
W = KE =
Option B
C
W = KE =
Option C
D
W = KE =
Option D
13

What does it mean when work is positive?

A
Velocity is greater than kinetic energy.
B
Kinetic energy is greater than velocity.
C
The environment did work on an object.
D
An object did work on the environment.
14

The mass of an object with 500 J of kinetic energy moving with a velocity of 5 m/s is kg. (Report the answer to one significant figure.)

Answer not available

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