WorksheetsWork & Machines Review
Total questions: 26
Worksheet time: 13mins
Name
Class
Date
1.
The board acts as a simple machine to help lift a heavy rock. The board would be classified as what type of simple machine?
a)
ramp
b)
lever
c)
pulley
d)
inclined plane
2.
Which two simple machines are found in a pair of scissors?
a)
screw and lever
b)
lever and wedge
c)
screw and inclined plane
d)
wedge and inclined plane
3.
Using a simple machine, the machine cannot decrease the amount of _____, but can increase the amount of _____.
a)
work, force
b)
force, work
c)
power, energy
d)
energy, power
4.
How does a single fixed pulley, help you do work?
a)
changes the direction of the force
b)
increases the amount of applied force
c)
decreases the amount of applied force
d)
allows you to pull the rope a shorter distance
5.
What is a device that makes work easier by changing the size or direction of the force?
a)
Power
b)
Watt
c)
Machine
d)
Force
6.
What is the work done by a machine on an object?
a)
Power
b)
Work Output
c)
Work Input
d)
Lever
7.
What is the work that you do on a machine?
a)
Work Output
b)
Work Input
c)
Lever
d)
Power
8.
In which situation is a person doing work on an object?
a)
A school crossing guard raises a stop sign that weighs 10 N.
b)
A student walks while wearing a backpack that weighs 15 N.
c)
A man exerts 350 N of force on a rope attached to a house.
d)
A worker holds a box 1 m off the floor.
9.
How does a ramp make lifting a heavy object easier?
a)
The object is moved over a shorter distance.
b)
The ramp increases the amount of work you do.
c)
Less force is needed to move the object over a longer distance.
d)
More force is needed to move the object over a longer distance.
10.
Greg applies a force of 100 N to move a box 5 meters. How much work did he do?
a)
100J
b)
500J
c)
5J
d)
500N
11.
What two things must happen for work to be done?
a)
The object must move and there must be an output force.
b)
The object must move in the opposite direction of the force.
c)
The object must move in the same direction as the force.
d)
The object must move and the mechanical advantage must be greater than 1.
12.
What is the unit for work?
a)
Joule
b)
Joule per second
c)
Newton
d)
Watt
13.
What is power?
a)
The strength of someone or something
b)
The force that is used
c)
The work that is done
d)
The rate at which work is done
14.
What is the difference between using a screw driver and a power drill?
a)
The screw driver has more force.
b)
The screw driver has more power.
c)
The drill has more force.
d)
The drill has more power.
15.
A grooved wheel that holds a cable; can multiply force or change direction; crane, flagpole
a)
Pulley
b)
Wedge
c)
Incline Plane
d)
Lever
16.
A slanted flat surface; decreases force needed to lift an object by applying the force over a greater distance; ramp, stairs
a)
Pulley
b)
Wedge
c)
Incline Plane
d)
Lever
17.
A stiff plank that rotates around a single point known as the fulcrum; three different classes; see-saw, wheelbarrow, arm
a)
Pulley
b)
Wedge
c)
Wheel & Axle
d)
Lever
18.
Two inclined planes back to back; changes the direction of force; an axe, a knife, a plow, a chisel
a)
Pulley
b)
Wedge
c)
Incline Plane
d)
Screw
19.
A larger circle moving around a smaller circle; gears, bicycle chain, car tires
a)
Pulley
b)
Wheel & Axle
c)
Screw
d)
Lever
20.
Shaina uses a shovel to dig a hole to plant a tree. A shovel is an example of a compound machine because it is made up of what two simple machines?
a)
Wheel and axle and a lever
b)
Lever and a wedge
c)
Screw and wedge
d)
Inclined plane and wedge
21.
The picture shows a light bulb. The bottom of this light bulb is an example of what type of simple machine?
a)
a lever
b)
a pulley
c)
a screw
d)
a wedge
22.
Your mother asks you to move a large rock from her garden. The rock is too heavy to lift. Because you are an excellent science student, you understand how simple machines make work easier. You use a long pole balanced on a brick to lift the rock and start it rolling. You push down on one end of the pole and the rock moves up. This simple machine is an example of a(n)
a)
Fixed pulley
b)
Inclined plane
c)
First class lever
d)
Second class lever
23.
Mechanical advantage is a measure of how much a machine multiplies the input
a)
Efficiency
b)
Force
c)
Power
d)
Work
24.
A man is using a block and tackle to lift a heavy bale of hay. The block and tackle contains which simple machine?
a)
lever
b)
pulleys
c)
wheel and axle
d)
inclined plane
25.
Which machine would be an example of a lever?
a)
A ramp
b)
A wedge
c)
A screw
d)
A stapler
26.
The simple machine that is made of two inclined planes, back to back. It is used to increase the applied force and change the direction of the force. What is this simple machine?
a)
lever
b)
pulley
c)
ramp
d)
wedge
100 %
