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WorksheetsEnergy Work Review
Total questions: 33
Worksheet time: 1hrs 5mins
Wile E. Coyote eats a healthy breakfast before running after the Roadrunner. What is the energy transformation?
Chemical potential to kinetic
Kinetic to gravitational potential
Elastic to kinetic
Chemical potential to thermal
A ball rolls to the top of a frictionless hill. What is the energy transformation?
gravitational potential to kinetic
kinetic to thermal
kinetic to gravitational potential
chemical potential to kinetic
A child is at the top of a smooth slide and then slides down. At the bottom, the child comes to a stop when they reach the grass. What is the energy transformation?
elastic potential to kinetic to gravitational potential
gravitational potential to kinetic to elastic potential
kinetic to gravitational potential to kinetic
gravitational potential to kinetic to thermal
A rock falls off a table and lands on a spring, squishing it. What is the energy transformation?
gravitational potential to kinetic to gravitation potential
kinetic to elastic potential to gravitational potential
gravitational potential to kinetic to elastic potential
chemical to thermal
A 3.0 kg ball is on a table 1.5 m above the ground. What is its gravitational potential energy?
4.5 J
44.1 J
3.4 J
29.4 J
What is the kinetic energy of a 12 kg dog running at 3 m/s?
36 J
353 J
54 J
118 J
How much work is needed to push a resting 20 kg crate to a velocity of 5 m/s?
15 J
250 J
300 J
100 J
50 J of work is done lifting a 2.0 kg book in the air. How high was it lifted?
2.6 m
3.6 m
1.0 m
25 m
How much energy is used by a 100 W light bulb over 1 hour? (be sure to convert to seconds first)
100 J
36,000 J
360,000 J
240,000 J
A bike goes from 0 m/s to 12 m/s in a time of 4 seconds. What was its acceleration?
12 m/s/s
4 m/s/s
3 m/s/s
0.33 m/s/s
A car goes from 0 m/s to 8 m/s in a distance of 100 m. What is the car's acceleration?
0.32 m/s/s
0.64 m/s/s
12.5 m/s/s
0.08 m/s/s
Bobby lifts a book to the second floor in 20 seconds. Carol lifts the same book to the second floor in 10 seconds. Who did more work?
Bobby
Carol
They did the same amount of work
Not enough information
Bobby lifts a book to the second floor in 20 seconds. Carol lifts the same book to the second floor in 10 seconds. Who used more power?
Bobby
Carol
They did the same amount of work
Not enough information
A 0.300 kg orange falls off a 1.2 m high table. How much kinetic energy does the orange have when it reaches the ground?
3.5 J
0.22 J
0.40 J
4.6 J
A pendulum has 10 J of gravitational potential energy at its highest point. How much kinetic energy does it have at its lowest point?
0 J
2 J
5 J
10 J
At one point, a falling apple has 2 J of gravitational potential energy and 7 J of kinetic energy. How much kinetic energy does it have when it hits the ground?
2 J
7 J
9 J
5 J
A 4 kg ball is at rest on a 2.5 m high shelf. The ball falls off the shelf. How fast is the ball moving when it hits the ground?
49 m/s
7 m/s
12 m/s
9.8 m/s
A solar panel is connected to a lamp. Does the panel do positive or negative work on the lamp?
positive
negative
not enough information
A horse pulls a cart from rest to 3 m/s. Does the horse do positive or negative work on the cart?
positive
negative
not enough information
A box slides from 12 m/s to 6 m/s across a carpet. Does the carpet do positive or negative work on the box?
positive
negative
not enough information
A 25 kg cart in moving at 15 m/s when it hits a rough road and then slides to a stop in 30 m. What is the acceleration of the cart?
3.75 m/s/s
-3.75 m/s/s
5.2 m/s/s
-5.2 m/s/s
What is the unit for energy?
joule
newton
watt
m/s/s
A car is accelerated on a lavelled road and attains a velocity 4 times of its initial velocity. Inthis process,the potential energy of the car
(a) does not change
(b) becomes twice to that of initial
(c) becomes 4 times that of initial
(d) becomes 16 times that of initial
a
b
c
d
An iron sphere of mass 10 kg has the same diameter as an aluminium sphere of mass 3.5kg. Both spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same
(a) acceleration
(b) momenta
(c) potential energy
(d) kinetic energy
a
b
c
d
When a body falls freely towards the earth, then its total energy
(a) increases
(b) decreases
(c) remains constant
(d) first increases and then decreases
a
b
c
d
In case of negative work, the angle between the force and displacement is
(a) 0
(b) 45°
(c) 90°
(d) 180°
a
b
c
d
Water stored in a dam possesses
(a) no energy
(b) electrical energy
(c) kinetic energy
(d) potential energy
a
b
c
d
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g = 10 m/s2 )
(a) 6 x 10 J
(b) 6 J
(c) 0.6 J
(d) zero
a
b
c
d
The work done on an object does not depend upon the
(a) displacement
(b) force applied
(c) angle between force and displacement
(d) initial velocity of the object
a
b
c
d
The power of a motor pump is 2 kW. How much water per minute, the pump can raise to a height of 10 m? [given, g = 10 m/s2 ]
360 kg
1200 kg
330 kg
430kg
Which one of the following is not the unit’ of energy?
(a) Joule
(b) Newton metre
(c) Kilowatt
(d) Kilowatt hour
a
b
c
d
A body is falling from a height h. After it has fallen a height it will possess
(a) only potential energy
(b) only kinetic energy
(c) half potential and half kinetic energy
(d) more kinetic and less potential energy
a
b
c
d
A rocket is moving up with a velocity v. If the velocity of this rocket is suddenly tripled, what will be the ratio of two kinetic energies?
1 : 9
1 : 3
1 : 4
1 : 1
