AnswersGA-GSE Physical Science BSimple Machines

Simple Machines Answers

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B
Both make work easier, but compound machines consist of two or more simple machines.
B
Both make work easier, but compound machines have less mechanical advantage than simple machines.
B
Both can reduce the force needed to do work, but simple machines are more common in everyday machines.
B
Both always increase the force needed to do work, but compound machines are more common in everyday machines.
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Question illustration
a
a wedge
a
a screw
a
an inclined plane
a
a wheel and axle
3

A screw has 4 threads per centimeter and a circumference of 2 centimeters. What is the mechanical advantage of the screw?

A
2
B
4
C
6
D
8
4

most likely

s
sliding the box up an inclined plane to the shelf
r
rolling the box up an inclined plane on a cart
s
sliding the box across the floor and then lifting it using a pulley
r
rolling the box across the floor in a cart and then using a pulley
5

Which two simple machines can be found in a bicycle?

a
a lever and a wheel and axle
a
a pulley and a wedge
a
a wedge and a wheel and axle
a
an inclined plane and a pulley
6

The diagram shows a lever.

Question illustration
2
2
3
3
6
6
9
9
7

Julian stands on his toes to lift his body high enough to reach a book. In this example, what do Julian’s toes function as?

a
a pulley
a
a load
a
a wedge
a
a fulcrum
8

Horatio used the flat end of a hammer to remove a nail from a piece of wood.

Question illustration
l
lever.
p
pulley.
i
inclined plane.
w
wheel and axle.
9

Teeth are an example of which type of simple machine?

l
lever
w
wedge
i
inclined plane
p
pulley
10

best

M
Move the fulcrum 2 meters away from the side on which the force is applied.
M
Move the fulcrum 2 meters toward the side on which the force is applied.
M
Move the fulcrum 4 meters away from the side on which the force is applied.
M
Move the fulcrum 4 meters toward the side on which the force is applied.
11

Which best explains what will happen if Sharilyn unscrews a bolt with a short handled wrench?

A
The bolt will be easier to unscrew because it is closer to the fulcrum and the mechanical advantage will be reduced.
B
The bolt will be harder to unscrew because it is farther from the fulcrum and the mechanical advantage will be greater.
C
The bolt will be easier to unscrew because it is farther from the fulcrum and the mechanical advantage will be greater.
D
The bolt will be harder to unscrew because it is closer to the fulcrum and the mechanical advantage will be reduced.
12

Antwon made a table to study some simple machines.Which best describes how to correct the error in the table?

Question illustration
A
Remove "can also be used to lift objects" from the description of a screw.
B
Add "looks like two inclined planes placed back-to-back" to the description of a wheel and axle.
C
Move "reduces friction when object is being moved" to the description of a pulley.
D
Change "decreases distance" to "increases distance" in the description of an inclined plane.

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