Worksheets8th Physical Science GMAS Review - Simple Machines
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
Which simple machine changes the direction of the input force without increasing the output force?
a)
can opener
b)
fixed pulley
c)
wheelbarrow
d)
sledgehammer
2.
When doing work using simple machines, what happens when the effort distance is increased?
a)
The effort force is decreased.
b)
The effort force is increased.
c)
The resistance force is increased.
d)
The direction of the effort force is changed.
3.
Which of the following is often used as a lever?
a)
file
b)
nail
c)
saw
d)
crowbar
4.
Marley 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 lever
b)
lever and wedge
c)
screw and wedge
d)
inclined plane and wedge
5.
What type of simple machine is used to pull a flag up to the top of a flagpole?
a)
screw
b)
wheel and axle
c)
inclined plane
d)
pulley
6.
An example of using a lever is
a)
using a big spoon to stir a pot of soup.
b)
using a fork to scramble an egg.
c)
using a ramp to roll a barrel into a pickup truck.
d)
using a screwdriver to pry the lid off of a can of paint.
7.
Think of the threading of a screw being unwrapped. Which statement correctly describes the simple machine represented in the screw.
a)
The thread of a screw is a wedge wrapped around a shaft.
b)
The thread of a screw is an inclined plane wrapped around a shaft.
c)
The thread of a screw is a lever wrapped around a shaft.
d)
The thread of a screw is a pulley wrapped around a shaft.
8.
Which of these machines will make work easier by helping to lift a load and move it in a horizontal distance.
a)
wedge
b)
pulley
c)
wheelbarrow
d)
the claw end of a hammer
9.
A staircase is most like what type of simple machine?
a)
lever
b)
wedge
c)
inclined plane
d)
wheel and axle
10.
What would you do to reduce the amount of effort needed to lift something using a first class lever?
a)
Move the fulcrum to the middle of the lever.
b)
Move the fulcrum closer to the load.
c)
Move the fulcrum closer to the effort.
11.
In this illustration,
a)
the machine is decreasing mechanical advantage
b)
the machine is increasing mechanical advantage
c)
mechanical advantage is not changed
12.
In the image above,what advantage does Pulley A provide?
a)
It changes the direction of the force
b)
It reduces the amount of effort needed to lift the object
c)
It changes the direction of the force and reduces the amount of effort needed to lift the object
d)
It does not provide any advantages
13.
Which of these options would reduce the effort needed to lift a load the most?
a)
A really short and very steep inclined plane
b)
A very long and very steep inclined plane
c)
A very long and not very steep inclined plane
d)
Not using an inclined plane and instead lifting the object straight up
14.
How could I reduce the effort force needed to lift the load?
a)
move the fulcrum away from the load
b)
move the fulcrum closer to the load
c)
place the fulcrum in the middle
15.
Which of the following is true for the picture?
a)
elephant is the fulcrum, mouse is the effort, triangle is the load
b)
mouse is the fulcrum, triangle is the effort, elephant is the load
c)
triangle is the fulcrum, mouse is the effort, elephant is the load
16.
How can the lever be balanced?
a)
add weight to the right side
b)
move the fulcrum right
c)
move the heavier weight back
17.
Which type simple machine would the base of a light bulb be?
a)
screw
b)
wedge
c)
wheel and axle
d)
pulley
18.
A knife is an example of a (an)
a)
inclined plane
b)
wedge
c)
ramp
d)
pulley
19.
_______________________can be found as door knobs, steering wheels, screwdrivers, gears, and bicycle wheels.
a)
A. Levers
b)
B. Pulleys
c)
C. Inclined planes
d)
D. Wheel and axle
20.
Which force keeps a machine from being 100% efficient?
a)
Gravity
b)
Friction
c)
Air resistance
d)
Weight
21.
How does a wheel axle make work easier?
a)
It increase the distance over which the input force is applied.
b)
It changes the direction of the input force.
c)
It increases the input force.
d)
It increase the input force and change the distance over which it is applied.
22.
How does a screw make work easier?
a)
It changes the distance of the input force.
b)
It changes the direction of the input force.
c)
It increases the effect of the input force.
d)
In changes the distance and direction of the force being applied.
23.
How does an inclined plane make work easier?
a)
It changes the direction of the input force.
b)
It changes the distance over which the the input force is applied.
c)
It increase the effect of the input force.
d)
It changes the distance and direction of the input force.
24.
How does a wedge make work easier?
a)
It changes the direction of the input force.
b)
It changes the distance over which the input force is applied.
c)
It increase the effect of the input force.
d)
It changes the direction of the input force and increase its effect.
25.
How does a lever make work easier?
a)
It increases the distance over which the input force is applied.
b)
It increases the direction of the input force.
c)
It increases the effect of the input force.
d)
It changes the direction of the input force and increases the effect of the input force.
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