Practice Problems
Energy and Work
Directions:
On this worksheet ...
omit
Question 1
The diagram above shows a 1.87-kg cat jumping from the top of a 1.78-meter-high refrigerator to the top of a 1.06-meter-high counter. Compared to the gravitational potential energy on the top of the refrigerator, the cat's gravitational potential energy on top of the counter is
1.98 J less
1.35 J less
13.19 J less
19.43 J less
omit
Question 2
The graph shown above represents the kinetic energy, gravitational potential energy, and total mechanical energy of a moving block. Which phrase best describes the motion of the block?
it was thrown straight up
into the air
it was thrown horizontally
from a higher vertical position
it was being pushed up
an incline at a constant velocity
it was dropped from rest
from a higher vertical position
omit
Question 3
A 1-kg ball is thrown vertically upward with an initial kinetic energy of 187 J. What maximum height does it rise above the release position?
19.1 m
19.1 m
19.1 m
60.5 m
omit
Question 4
If a 1.9-kg bead is released from rest at point A, h
1
= 3.6 meters, how fast will it be sliding along the frictionless wire shown above when it reaches point D, h
2
= 1.1 meters?
8.4 m/sec
4.8 m/sec
20.5 m/sec
7 m/sec
omit
Question 5
A 1-kg ball is thrown horizontally off a 17.8-meter cliff with an initial kinetic energy of 187 J. How fast is the ball traveling when it is located 10.6 meters above the base of the cliff?
19.34 m/sec
22.7 m/sec
1.21 m/sec
11.88 m/sec
omit
Question 6
At what angle will the ball in
Question 5
strike the ground at the base of the cliff?
40.4º
58.4º
none of the given angles are correct
31.6º
44.0º
omit
Question 7
A 1-kg rubber ball traveling east at 6.0 meters per second hits a wall and bounces back directly west at 2.0 meters per second. Compared to the kinetic energy of the ball before it hits the wall, the kinetic energy of the ball after it bounces off the wall is
16 times greater
1/4 as great
9 times greater
1/9 as great
1/16 as great
4 times greater
1/3 as great
PhysicsLAB
Copyright © 1997-2023
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton