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Revision 1: work, power and simple machines M2

Total questions: 100

Worksheet time: 1hrs 9mins

Name
Class
Date
1.

What is needed calculate power? select all that apply

a)

work

b)

time

c)

mass

d)

distance

2.

What is needed to calculate work? select all that apply

a)

force

b)

distance

c)

time

d)

mass

3.

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power.

a)

Person A

b)

Person B

4.
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
5.

A student who weighs 350 N climbs a flight of stairs 6 m high in 10 sec. How much power does the student need to do this?

a)

35.6 J

b)

35.6 W

c)

210 W

d)

583 J

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 box is pushed across the floor a distance of 8 m with a force of 55 N in 7 s. What is the work done?

a)

440 J

b)

440 W

c)

62.9 J

d)

62.9 W

8.

Two factors that determine work are...

a)

Force

b)

Mass

c)

Velocity

d)

Distance

9.

If the object does not move then what is happening

a)

nothing

b)

work

c)

power

d)

no work is being done on the object

10.

The ( ) the force the ( ) work is done

a)

less, more

b)

smaller, more

c)

bigger, more

d)

bigger, less

11.

Fred kicks a ball with a force of 20N to George, who is 5M away.


How much work was done to the ball?

a)

25 J

b)

100 J

c)

4 J

d)

75 J

12.

If you push a cart with a force of 60 N for 2 m... how much work have you done?

a)

120 J

b)

30 J

c)

120 N

d)

30 N

13.

You do work when you mannequin pose with an object in your hand.

a)

True

b)

False

14.
Work divided by time equals...
a)

energy

b)

power

15.
The unit used to measure power is the 
a)

Watt

b)

Newton

c)

Joule

d)

Newton*meter

16.
How much time is needed to produce 720 Joules of work if 90 watts of power is used? 
a)

0.125 s

b)

8 s

c)

64800 s

d)

80 s

17.

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power.

a)

Person A

b)

Person B

18.
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

19.

A force of 4 N moves a box a distance of 3 m in 6 s. How much power is exerted?

a)

2 W

b)

6 W

c)

17 W

d)

278.7 W

20.
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

21.
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

22.
Work divided by time equals...
a)

energy

b)

power

23.
The unit of work is the ...
a)

joule

b)

force

24.
The unit of power is the...
a)

work

b)

watt

25.
Force multiplied by distance equals...
a)

work

b)

power

26.
Work is done on an object when the object moves in the SAME direction in which the force is applied.
a)

True

b)

False

27.
The FARTHER you move an object, the more work you do.
a)

True

b)

False

28.
The more POWER you use to move an object, the more work you do. 
a)

True

b)

False

29.
Power is the RATE at which work is done. 
a)

True

b)

False

30.

Newtons are the correct unit for which of the following?

a)

Force

b)

Work

c)

Power

d)

Acceleration

31.
In order to do work on an object, the force you exert must be...
a)

The maximum amount of force you are able to exert.

b)

In the same direction as the object's motion.

c)

In a direction opposite to Earth's gravitational force.

d)

quick and deliberate.

32.

How do we calculate work?

a)

W = F * d

b)

w = f / d

33.

Which is the correct unit for work?

a)

Joules

b)

Newton

c)

meter

d)

Watts

34.
How do you calculate power?
a)

P = W/t

b)

P = E/t

c)

P = w * t

d)

P = bbq/chicken

35.

What is the correct unit for power?

a)

Watt

b)

Joules

c)

Newtons

d)

seconds

36.

It took 500 Newtons of force to push a car four meters. How much work was done?

a)

2000 J

b)

125 J

c)

0.008 J

d)

500 J

37.
1. A book weighing 1.0 newton is lifted 2 meters.  How much work was done?
a)

2 J

b)

0.5 J

38.
A force of 15 newtons is used to push a box along the floor a distance of 3 meters.  How much work was done?
a)

3 J

b)

45 J

39.
It took 500 newtons of force to push a car 4 meters.  How much work was done?
a)
2,000 J
b)
125 J
40.

What is the power of a kitchen blender if it can perform 3,750 Joules of work in 15 seconds?

a)

250 W

b)

0.004 W

c)

56,250 W

d)

25 W

41.

How much power is used if a force of 35 Newtons is used to push a box a distance of 10 meters in five seconds? (Hint: Solve for work first. This is a 2-step problem.)

a)

70 W

b)

3.5 W

c)

7 W

d)

350 J

42.
A set of pulleys is used to lift a piano weighing 1,000 newtons.  The piano lifted 3 meters in 60 seconds  How much power is used?
a)

16.67 watts

b)

50 watts

43.
How much power is used if a force of 35 newtons is used to push a box a distance of 10 meters in 5 seconds?
a)

70 watts

b)

1750 watts

44.

The purpose of a simple machine is to make work easier by allowing for a push or pull to occur over an increased distance.

a)

True

b)

False

45.

Why are levers useful?

a)

For seesawing

b)

Allow us to measure the force of an object

c)

Helps lift weight at one point of its length

d)

All of the above

46.

Which of the items lifted below can be considered a wedge?

a)

A Pencil

b)

A hammer

c)

An axe

d)

Two inclined planes put together

47.

Why are simple machines "simple"?

a)

They reduce the effort required to perform a simple task. Less force can be applied.

b)

They are actually quite complicated.

c)

You can easily put two pieces of wood together.

d)

Splitting through wood is much faster.

48.

Which simple machine is this?

a)

Pulley

b)

Wheel-and-axle

c)

Inclined Plane

d)

Lever

49.

Where might a screw be used?

a)

A bottle cap

b)

A Lightbulb

c)

Cell Phone Charger

d)

All of the above

50.

Which simple machines are present?

a)

Wedge

b)

Wheel-and-axle

c)

Inclined Plane

d)

Lever

51.

A seesaw is an example of a

a)

wedge

b)

lever

c)

inclined plane

d)

pulley

52.

Stairs is a kind of a/an

a)

wedge

b)

pulley

c)

inclined plane

d)

wheel and axle

53.

Lightbulb is a kind of a/an

a)

wedge

b)

pulley

c)

incline plane

d)

screw

54.
Which is not a type of simple machine?
a)
spring
b)
screw
c)
pulley
d)
wedge
55.

This device is a kind of a/an

a)

wedge

b)

lever

c)

incline plane

d)

wheel and axle

56.
What type of simple machine is this?
a)
wheel and axle
b)
gear
c)
lever
d)
inclined plane
57.

The fixed point on the lever is called

a)

load

b)

resistance

c)

bar

d)

fulcrum

58.

The device used to raise a flag up a flag pole is an example of a

a)

wheel and axle

b)

lever

c)

inclined plane

d)

pulley

59.

Identify this simple machine

a)

Lever

b)

Wheel & Axle

c)

Inclined Plane

d)

Screw

60.
What is an example of a lever?
a)

ramp

b)

car

c)

Nut-cracker

d)

teeth

61.
What is an example of a wheel and axle?
a)
ax
b)
light bulb
c)
skateboard ramp
d)
bus tire
62.
What is an example of a wedge?
a)
door stop
b)
Your hair
c)
curtain
d)
wood screw
63.
What is an example of a pulley?
a)
slide
b)
flag pole
c)
ax
d)
chapstick
64.
What is a lever?
a)
made of 2 inclined planes that are back to back
b)
means attracted to a magnet
c)
stiff bar that rests on a fulcrum
d)
made of 2 inclined planes that are back to back
65.

What is an inclined plane?

a)

wheels that turn on a post

b)

made from two or more simple machines

c)

flat surface that is higher at one end

d)

uses a wheel and a rope to lift a load

66.
What is a wheel and axle?
a)
wheel that turns on a post
b)
flat surface that is higher at one end
c)
made from two or more simple machines
d)
uses a wheel and rope to lift a load
67.
Name this simple machine. 
a)
Inclined Plane
b)
Lever
c)
Pulley
d)
Wedge
68.
Name this simple machine. 
a)
Screw
b)
Lever
c)
Pulley
d)
Wedge
69.
Which is not a type of simple machines?
a)
spring
b)
screw
c)
pulley
d)
wedge
70.
Work is
a)
energy from the sun
b)
a force that moves an object
c)
a type of machine
d)
a force that pulls you towards the Earth
71.
What type of simple machine is found on the cap of a pickle jar?
a)
lever
b)
inclined plane
c)
screw
d)
wheel and axle
72.
What is the fixed point upon which a lever rotates?
a)
fulton
b)
fulcrum
c)
furmen
d)
falcon
73.
What type of simple machine is found on the floor of a bathtub?
a)
screw
b)
inclined plane
c)
wedge
d)
pulley
74.
Which of these is an example of a wedge?
a)
skateboard
b)
broom
c)
stairs
d)
butter knife
75.
A screw is made up of _________ wrapped around a post or rod.
a)
treads
b)
springs
c)
threads
d)
strings
76.
Which of these is not an example of an inclined plane?
a)
ladder
b)
stairs
c)
wall
d)
driveway
77.
Which is an example of someone using a simple machine to do work?
a)
a boy runs across a football field
b)
a banker counts money
c)
a mother puchses a stroller up a ramp into a building
d)
a girl eats a sandwich
78.
Jan is using a screwdriver to insert a screw.  The screwdriver is being used as
a)
a pulley
b)
a screw
c)
a lever
d)
a wheel and axle
79.
Thomas is using a screwdriver to pry open a paint can,  The screwdriver is being used as
a)
a pulley
b)
an inclined plane
c)
a screw
d)
a lever
80.
Which is a characteristic of simple machines?
a)
they run on electricity
b)
they take a long time to make
c)
they have few or not moving parts
d)
they are not very large
81.
Which type of simple machine would be found on the bottom of a wagon?
a)
a pulley
b)
a screw
c)
a wedge
d)
a wheel and axle
82.
What two parts might make a pulley?
a)
wheel and axle
b)
wheel and wire
c)
wheel and screw
d)
wheel and fulcrum
83.
Which  simple machine is found on the head of an ax?
a)
wedge
b)
lever
c)
pulley
d)
screw
84.
The seesaw is an example of which simple machine?
a)
incline plane
b)
wedge
c)
lever
d)
pulley
85.
The bottle cap is an example of which simple machine?
a)
inclined plane
b)
wedge
c)
screw
d)
lever
86.
The door knob and rod make up which simple machine?
a)
lever
b)
pulley
c)
screw
d)
wheel and axle
87.
The wheel and rope make up which simple machine?
a)
pulley
b)
lever
c)
wheel and axle
d)
inclined plane
88.
Identify this simple machine
a)
Lever
b)
Wheel & Axle
c)
Inclined Plane
d)
Screw
89.
Two examples of a pulley...
a)
knife & axe blade
b)
lightbulb & screw
c)
flagpole hoist & window blinds
d)
catapult & teeter totter
90.
Which of the following does a simple machine do?
a)
allows the users to apply less force over a longer distance
b)
reduce the amount of force needed to do work
c)
change the direction of the applied force
d)
all of the above
91.
What do you call a machine made up of two or more simple machines?
a)
complicated machine
b)
compound or complex machine
c)
comprehensive machine
d)
constructive machine
92.
An inclined plane wrapped around a rod forms this simple machine 
a)
lever
b)
pulley
c)
screw
d)
wedge 
93.
An axe is an example of a
a)
pulley
b)
inclined plane
c)
screw
d)
wedge 
94.
A seesaw is an example of a  
a)
wedge
b)
lever 
c)
inclined plane 
d)
pulley 
95.
Which is not a type of simple machine?
a)
spring
b)
screw
c)
pulley
d)
wedge
96.
What type of simple machine is this?
a)
wheel and axle
b)
gear
c)
lever
d)
inclined plane
97.
The transfer of energy that occurs when a force makes an object move is known as 
a)
effort
b)
potential 
c)
kinetic 
d)
work 
98.
Name this simple machine.
a)
Lever
b)
Wedge
c)
Pulley
d)
Inclined Plane
99.
This picture is an example of a _________.
a)
pulley
b)
wedge
c)
wheel and axle
d)
screw
100.
What simple machine can be used to split things apart and also it can hold open a door?
a)
Lever
b)
Pulley
c)
Wedge
d)
Screw

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