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WorksheetsForce, Work, Power, & Simple Machines
Total questions: 44
Worksheet time: 1hrs 29mins
Name
Class
Date
1.
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
2.
Which of these is an example of a wedge?
a)
skateboard
b)
broom
c)
stairs
d)
scissors
3.
a)
Wheel and axle, Pulley, Lever
b)
Wheel and axle, Pulley
c)
Lever, Pulley
d)
Wheel and axle, Pulley, Lever, Wedge
4.
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 man pushes a stroller up a ramp.
d)
A girl eats a sandwich.
5.
What is the unit used to measure power?
a)
Joule
b)
Watt
c)
Newton
d)
%
6.
What is the unit used to measure work?
a)
Joule
b)
Watt
c)
Newton
d)
%
7.
What is the unit used to measure efficiency?
a)
Joule
b)
Watt
c)
Newton
d)
%
8.
What is the unit used to measure mechanical advantage?
a)
Joule
b)
Watt
c)
Newton
d)
(no unit needed)
9.
Power is:
a)
how fast work is done.
b)
a force applied through a distance.
c)
being in control.
d)
how strong you are.
10.
You do work when
a)
you exert a force on an object but the object does NOT move.
b)
you exert a force on an object that causes it to move in the same direction as the force.
c)
you exert a force on an object and it moves in the opposite direction of your force.
d)
the object moves, but no force is applied.
11.
What is the formula for work?
a)
output work/input work X 100%
b)
work/time
c)
input force/output force
d)
force X distance
12.
What is the formula for power?
a)
output work/input work X 100%
b)
work/time
c)
input force/output force
d)
force X distance
13.
What is the formula for mechanical advantage?
a)
output work/input work X 100%
b)
work/time
c)
output force/input force
d)
force X distance
14.
What is the formula for mechanical efficiency?
a)
output work/input work X 100%
b)
work/time
c)
input force/output force
d)
force X distance
15.
The work you do to a machine is known as _______ ?
a)
output work
b)
efficiency
c)
power
d)
input work
16.
How does a ramp make moving something easier?
a)
It changes the direction of your force.
b)
It does not make it easier. A ramp makes it harder to move.
c)
It decreases the amount of force by increasing the distance.
d)
It decreases both force and distance.
17.
The number of times a machine increases a force exerted on it.
a)
Efficiency
b)
Output force
c)
Mechanical Advantage
d)
Input Work
18.
What type of simple machine is found on the cap of a pickle jar?
a)
lever
b)
inclined plane
c)
pulley
d)
screw
19.
An example of a wedge is a:
a)
eraser
b)
spoon
c)
magnet
d)
knife
20.
An example of an inclined plane is a
a)
doorknob
b)
knife
c)
ramp
d)
flagpole
21.
The fixed point that a lever rotates around is called the
a)
wedge
b)
inclined plane
c)
lever
d)
fulcrum
22.
If you use a crowbar to get the lid off of a bucket, what simple machine are you using?
a)
Inclined Plane
b)
Pulley
c)
Wheel and Axle
d)
Lever
23.
a)
wedge
b)
pulley
c)
inclined plane
d)
screw
24.
a)
wedge
b)
lever
c)
inclined plane
d)
wheel and axle
25.
a)
wheel and axle
b)
pulley
c)
screw
d)
compound machine
26.
Which of the following is the BEST choice to lift a piano to a third floor window?
a)
lever
b)
pulley
c)
inclined plane
d)
wheel and axle
27.
A wheel with a rope or belt around it. Helps a person lift or move something up, down, or across an area.
a)
screw
b)
pulley
c)
wedge
d)
lever
28.
The blade of a shovel acts as one type of machine as it separates soil when it enters the ground. The handle of the shovel acts as a second type of machine when the person using it lifts the soil. What 2 simple machines make up a shovel?
a)
pulley and wedge
b)
screw and inclined plane
c)
lever and pulley
d)
wedge and lever
29.
Which simple machine is most like a human arm?
a)
a lever
b)
a wedge
c)
an inclined plane
d)
a screw
30.
a)
lever
b)
pulley
c)
wheel and axle
d)
inclined plane
31.
a)
Inclined plane
b)
Lever
c)
Screw
d)
Pulley
32.
Brayden and his father used a ramp to get a dresser into the truck. What did the ramp decrease?
a)
Height lifted
b)
Input force
c)
Distance moved
d)
Work done
33.
A machine makes work easier and more effective by changing all of the following except:
a)
the amount of work you do
b)
the amount of force exerted
c)
the distance over which you exert your force
d)
the direction in which the force is exerted
34.
How does a driver use a steering wheel as a simply machine?
a)
The driver is using a wheel and axle to reduce the amount of force.
b)
The driver is using a lever to steer the vehicle
c)
The driver is using a pulley and lever to steer the vehicle
d)
The driver is using a wheel and axle to reduce the amount of work needed to steer the vehicle
35.
The % of the input work that is converted to output work is
a)
mechanical advantage
b)
work
c)
power
d)
mechanical efficiency
36.
A simple machine that consists of two attached circular objects that rotate about a common axis, each one with a different axis is a
a)
wheel and axle
b)
lever
c)
pulley
d)
wedge
37.
A simple machine that is a flat, sloped surface
a)
wheel and axle
b)
lever
c)
inclined plane
d)
wedge
38.
A simple machine that is a inclined plane that moves is a
a)
screw
b)
lever
c)
inclined plane
d)
wedge
39.
A simple machine that consists of a rigid bar that pivots about a fixed point.
a)
screw
b)
lever
c)
inclined plane
d)
wedge
40.
A simple machine that is an inclined plane wrapped around a cylinder is a
a)
screw
b)
lever
c)
inclined plane
d)
pulley
41.
A simple machine that consists of a grooved wheel with a rope wrapped around it.
a)
wheel and axle
b)
lever
c)
inclined plane
d)
pulley
42.
When two kinds of pulleys are used together, the system is called a
a)
moveable pulley
b)
fixed pulley
c)
block and tackle
d)
tackle box
43.
The force exerted on an object by a machine is the
a)
input force
b)
input work
c)
output force
d)
output work
44.
The force you exert on a machine is the
a)
input force
b)
input work
c)
output force
d)
output work
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