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WorksheetsWork, Energy, and Power
Total questions: 54
Worksheet time: 54mins
P = E/W
A 10 gram ball is rolling at 3 m/s. How much energy does it have?
30 J
15 J
4.5J
.045J
A 10 gram ball is held 2 meters from the ground. How much energy does it have?
0 J
.2 J
2 J
20 J
A 10 gram ball is held 2 meters from the ground. What type of energy does the ball have?
Kinetic Energy
Elastic Potential Energy
Gravitational Potential Energy
You serve a volleyball with a mass of 2100 g. The ball leaves your hand with a velocity of 30 m/s. How much kinetic energy does the volleyball have?
945 J
1890 J
94500 J
189000 J
A toy baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby has a mass of 200 grams. How much potential energy does the baby carriage+ baby system have?
.42 J
4.2 J
42 J
42000 J
A toy car is traveling with a velocity of 4 m/s and has a mass of 1120 g. How much kinetic energy does the toy car have?
8.96J
8960 J
17.92 J
17920 J
Two objects were lifted by a machine. Object A had a mass of 2000 grams, and was lifted at a speed of 2 m/sec. Object B had a mass of 4000 grams and was lifted at a rate of 3 m/sec. Which object had a higher amount of kinetic energy when lifted?
Object A
Object B
Both are the same since they travelled the same distance
Not enough information
A ball is thrown into the air and gains 25 J of GPE. If it has a mass of 0.5 kg, How high up into the air did it travel?
.02 m
.2 m
2 m
20 m
A 45N girl sits on a 8N bench that is .5 m tall. How much work is done on the bench?
0 J
22.5 J
18.5 J
26.5 J
A boy lifts a 30N dragon 2 meters above the ground. How much work did the boy do on the dragon?
60 J
600 J
15 J
150 J
Suppose you want to calculate how much work it takes to lift a 160 N barbell. Besides the mass of the barbell, what other information do you need to know?
the shape of the weights
how high the barbell is being lifted
the strength of the person diong the lifting
how quickly the lifts are being done
If you are in a car that is being pulled down a 56.0 m path with a force of 12.5 Newton’s (N), what is the “work” done on the car?
70 J
700 J
350 J
7000 J
3500 J
A crane does work of 13,500 J with a force of 5200 N to lift a beam. How far can the beam be lifted (in meters)?
702 M
70200000 m
2.6 m
26 M
A 600 kg great white shark is lurking below an observation cage. His movement is being studied from a series of motion sensors below the boat. The shark leisurely charges the cage, strikes it and makes the cage rattle. Later, the shark returns for another run at the cage. The shark strikes the cage with 12,800 N of force. The shark traveled for 10 m in making its run. The cage is designed to withstand 124,500 N-m of “work” before it breaks. Should the man in the cage be worried?
Yes, because the shark is doing more work on the cage than it can withstand
No, because the shark is not doing enough work on the cage to get it to break
A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds. How much power was used?
60 W
600 W
36 W
360 W
How much time is needed to produce 720 Joules of work if 90 watts of power is used?
64800 sec
6 sec
7 sec
8 sec
If 68 W of power is produced in 18 seconds, how much work is done?
1080 J
180 J
3.33 J
0 J
A set of pulleys lifts an 800 N crate 4 meters in 7 seconds. What power was used?
457.1 W
1400 W
.035 W
28.6 W
If a runner exerts 350 J of work to make 125 W of power, then how long did it take the runner to do the work?
2.4 sec
2.8 sec
8.2 sec
1.1 sec
If 360 Joules of work are needed to move a crate a distance of 4 meters in 5 sec, what is the power used?
72 W
144 W
60 W
36 W
A 4357-kg roller coaster car starts from rest at the top of a 36.5 m high track. Determine the speed of the car at the top of a loop that is 10.8 m high.
22.4 m/s
2.24 m/s
27.01 m/s
2.7 m/s
A 4.00 kg ball is on a 5.00 m ledge. If it is pushed off the ledge, how much kinetic energy will it have just before hitting the ground?
20 J
200 J
2000 J
50 J
How fast must a 1000 kg car be moving to have a kinetic energy of 400 000 J?
22.7 m/s
28.28 m/s
800 m/s
Select all: Work is equal to...
KE + PE
Change in energy
mg
Fd
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
A girl weighs 400 N. She runs up a flight of stairs of height 5 m in 4 seconds. Her power is:
320 W
400 W
500 W
2 000 W
20 m
When an object is carried at a constant
velocity by a force,
no work is done on the
object.
the work done is maximum on the
object.
the work is done minimum on the
object.
the work done is 100 % on the
object.
The SI Unit for Energy is
Joule
Newton
Calorie
Watt
Which of the following is defined as an energy transfer?
kinetic energy
work
potential energy
chemical energy
A light plastic cart and a heavy steel cart are both pushed with the same force for a distance of 1.0 m, starting from rest. After the force is removed, the kinetic energy of the light plastic cart is ________ that of the heavy steel cart.
greater than
equal to
less than
can't say unless we know how big the force is
Each of the boxes shown is pulled for 10 m across a level, frictionless floor by the force given. Which box experiences the greatest change in its kinetic energy?
A
B
C
D
E
Rank in order, from largest to smallest, the gravitational potential energies of the balls.
1 > 2 = 4 > 3
1 > 2 > 3 > 4
3 > 2 = 4 > 1
3 > 2 > 4 > 1
A small child slides down the four frictionless slides A–D. Rank in order, from largest to smallest, her speeds at the bottom.
vD > vA > vB > vC
vD > vA = vB > vC
vC > vA > vB > vD
vA = vB = vC = vD
If a charging elephant has kinetic energy, it must also have
potential energy
momentum
work
all of these
