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workdone and energy

Total questions: 35

Worksheet time: 21mins

Name
Class
Date
1.
The unit of work is the ...
a)
joule
b)
force
2.
Force multiplied by distance equals...
a)
work
b)
power
3.
Work is done on an object when the object moves in the SAME direction in which the force is applied.
a)
True
b)
False
4.
The FARTHER you move an object, the more work you do.
a)
True
b)
False
5.
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 
6.
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 
7.

Which of the following is the best example of work being done.

a)

doing homework

b)

lifting a box

c)

pushing a stationary box

d)

holding a box

8.

What would 54N be an example of?

a)

work

b)

power

c)

distance

d)

force

9.

How far will an object travel if a force of 350 N that is applied on it produces zero amount of work?

a)

3 m

b)

2 m

c)

1 m

d)

0 m

10.

Which is the unit of workdone ?

a)

newton

b)

joule

c)

pascal

d)

kg/m

11.

1 joule =

a)

1 N x 1 m

b)

1 N / 1 m

c)

1 m / 1 N

d)

100 N x m

12.

workdone according to the picture is _____

a)

F x A

b)

F x B

c)

A x B

d)

F x S

13.

Which of the following is the best example of work being done is zero?

a)

doing homework

b)

lifting a box and walking.

c)

pushing a wheel barrow to 5 m distance

d)

dragging a toy car

14.

When is work done zero

a)

displacement = 0

b)

force = 0

c)

pressure = 0

d)

area =0

15.

Which of the statements are True about work done ?

a)

we need energy to do work

b)

we need to apply force to do work

c)

we need area to find work done.

d)

Nm is also a unit of workdone.

e)

work done can be zero

16.
Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?
a)
Chemical to light
b)
Electrical to chemical
c)
Electrical to light
d)
Chemical to electrical
17.
What energy transformations take place when a battery-operated radio is in use?
a)
Electrical to chemical to light
b)
Sound to chemical to mechanical
c)
Chemical to electrical to sound
d)
Light to electrical to thermal
18.
Which of the following devices transforms electrical energy into mechanical energy?
a)
An e-reader
b)
a fan
c)
a manual pencil sharpener
d)
ipod
19.
"Energy can be transformed from one form into another or transformed from one region or another, but energy cannot be created or destroyed."
Which law is this?
a)
Law of Conservation of Mass
b)
Newton's Second Law
c)
Law of Conservation of Energy
d)
Newton's Third Law
20.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
21.
__________ is stored energy. 
a)
Potential
b)
Kinetic
c)
None of the above 
d)
All of the above 
22.
Which of the following energy transfers occurs when food is digested?
a)
chemical to mechanical
b)
radiant to nuclear
c)
mechanical to potential
d)
thermal to chemical
23.

Kinetic energy is...

a)

energy carried in ultraviolet waves

b)

energy stored in food

c)

energy in motion

d)

energy from splitting an atom

24.

Kinetic energy is measured in

a)

Newtons (N)

b)

Joules (J)

c)

Kilograms (kg)

d)

miles per hour (mph)

25.

Where would this tossed baseball have the least amount of kinetic energy?

a)

point W

b)

point X

c)

point y

d)

point z

26.

Where would this tossed baseball have the greatest amount of kinetic energy?

a)

point W

b)

point X

c)

point y

d)

point z

27.

Holding a marble at the top of a ramp

a)

Potential

b)

Kinetic

28.

A boy standing on top of a slide

a)

Potential Energy

b)

Kinetic Energy

29.

A girl sliding down a slide

a)

Kinetic Energy

b)

Potential Energy

30.

Energy that matter has because of its position

a)

Potential Energy

b)

Kinetic Energy

31.

What type of energy is elastic energy?

a)

Kinetic Energy

b)

Potential Energy

c)

Chemical Energy

d)

Mechanical Energy

32.

____________________ is the storage of energy

a)

Chemical Energy

b)

Potential Energy

c)

Mechanical Energy

d)

Kinetic Energy

33.

When rolling a marble down a ramp when does it have the most potential energy?

a)

At the bottom of the ramp

b)

While traveling down the ramp

c)

While being lifted to the top of the ramp

d)

At the top of the ramp

34.

As a two kids play on a teeter totter (seesaw) when do they have the most potential energy?

a)

When they are at their highest point

b)

Just before their muscles push them upward

c)

As they begin coming down

d)

When they reach the lowest point

35.

Sound is caused by?

a)

Force

b)

Vibrations

c)

Instruments

d)

Air

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