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Work, Power, Energy 2

Total questions: 37

Worksheet time: 2hrs 41mins

Name
Class
Date
1.

A motorcycle has mass of 200 Kg is moving with the velocity of 15 m/s. What is the kinetic energy of the motorcycle?

a)

1500 J

b)

3000 J

c)

22500 J

d)

45000 J

2.

Pratik can carry 200N load and walks a distance of 100m in 50 seconds. What is the power of Pratik?

a)

400 W

b)

1000000 W

c)

100 W

d)

25 W

3.
 Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
4.

The equation for POWER is

a)

power = mass x time

b)

power = work / time

c)

power = time / work

d)

power = work x time

5.

In which of these cases is work being done?

a)

A student sleeps

b)

A student pushes a locked door that does not move

c)

A student carries her chair into another room

d)

A student sits on the carpet

6.
A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 
a)
77 J
b)
7.7 J 
c)
0.7 J 
d)
770 J 
7.
A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?
a)
600 J 
b)
660 J
c)
900 J 
d)
1200 J 
8.
You do 90 joules of work in 30 seconds. How much power have you generated?
a)
30 watts
b)
3 watts
c)
120 watts
d)
270 watts
9.

What is needed to calculate work?

a)

force

b)

distance

c)

time

d)

mass

10.
You move a 12-newton box up a 6-meter ramp. In order to find out how much power you created, what would you need to know?
a)
The mass of the box
b)
The slope of the ramp 
c)
The direction the box moved
d)
How long the task took
11.
You do 90 joules of work in 30 seconds. How much power have you generated?
a)
30 watts
b)
3 watts
c)
120 watts
d)
270 watts
12.
You move an 8-newton weight five meters in 4 seconds. How much power have you generated?
a)
160 watts
b)
10 watts
c)
6.4 watts
d)
17 watts
13.
Which of the following would produce the most power?
a)
A mass of 10 kilograms lifted 10 meters in 10 seconds 
b)
A mass of 10 kilograms lifted 10 meters in 5 seconds
c)
A mass of 5 kilograms lifted 10 meters in 5 seconds
d)
A mass of 5 kilograms lifted 5 meters in 10 seconds
14.
The unit of work is the ...
a)
joule
b)
force
15.
The unit of power is the...
a)
work
b)
watt
16.
Force multiplied by distance equals...
a)
work
b)
power
17.

A strongman exerts 1500 N on the side of a building. After 2 minutes, the building doesn't move. How much work did he do?

a)

180,000 J

b)

0 J

c)

750 J

d)

1500 J

18.

You use 950 J of energy to push a sofa. If it took you 5 sec to move the sofa, what was your power?

a)

190 J

b)

4750 J

c)

4750 W

d)

190 W

19.

A runner exerts 240,000 J when she runs for 600 seconds. What is the runner's power?

a)

400 W

b)

600 W

c)

400 J

d)

600 J

20.

What is the KE of a football which has a mass of 0.8 kg and is kicked at a velocity of 10m/s?

a)

80 J

b)

3.2 J

c)

160 J

d)

40 J

21.

What is the kinetic energy of a zorb and human with a total mass of 90Kg rolling at 10m/s?

a)

3,700J

b)

900J

c)

4,500J

d)

6,500J

22.

What is the kinetic energy of a 4kg shotput thrown with a velocity of 13m/s?

a)

676 J

b)

3.25 J

c)

17J

d)

338 J

23.
Roger Federer’s tennis ball has a mass of 0.3 kg. If he holds the ball above the ground at a height of 2.0 m to serve, what is its gravitational potential energy (GPE)?
a)

6.0 J

b)

0.6 J

c)

6.67 J

d)

0.15 J

24.
A leopard with a mass of 55.00 kg climbs 12.0 m up a tree. What is its GPE?
a)

6,600 J

b)

660 J

c)

4.58 J

d)

0.22 J

25.
With all of his Batgear on, Batman has a mass of 90.7 kg. How much potential energy does he have if he's perched on top of a 1,575 m building? 
a)

1,428,525 J

b)

142,852 J

c)

0.058 J

d)

17.36 J

26.
Calculate the potential energy of a rock with a mass of 55 kg while sitting on a cliff that is 27 m high.
a)

14,850 Joules

b)

1,485 Joules

c)

2 Joules

d)

743 Joules

27.

Mass is measured in:

a)

J

b)

lbs

c)

kg

d)

N

28.

The following scenario relates to a rollercoaster:

When at the top of a hill, a cart has _________ energy, as it travels down the track, it has _______ energy.

a)

Kinetic, potential

b)

potential, generational

c)

potential, kinetic

d)

kinetic, exhilirating

29.
According to the Law of Conservation of Energy, energy cannot be _________ or ____________. 
a)
destroyed, destroyed
b)
created, saved
c)
created, destroyed
d)
lost, found
30.

What is the Total Energy at the top?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

31.

What is the KE 1/4th of the way down?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

32.

What is the KE 1/2 of the way down?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

33.

What is the KE 3/4th of the way down?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

34.

What is the KE at the bottom?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

35.

What is the GPE at the top?

a)

50 J

b)

25 J

c)

0 J

d)

100 J

36.

What kind of energy does an object possess when it's resting on top of the hill?

a)

Potential Energy

b)

Chemical Energy

c)

Kinetic Energy

d)

All of the above

37.

The SI Unit for Energy is

a)

Joule

b)

Potential

c)

Calorie

d)

Kilojoule