Simple Machines Study Guide

Physics

A comprehensive quiz covering the mechanics, efficiency, and types of simple machines including levers, pulleys, and wedges.

mechanics engineering physics

10 Questions Medium Ages 14+ Apr 29, 2026

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About this Study Set

This study set covers Physics through 10 practice questions. A comprehensive quiz covering the mechanics, efficiency, and types of simple machines including levers, pulleys, and wedges. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 10 questions from the Simple Machines Study Guide study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the efficiency of a machine that uses 50 N effort over 8 m to lift 100 N over 4 m?

A 70%
B 80%
C 90%
D 100%

2 True or False: In the real world, there is a machine that is 100% efficient.

A True
B False

3 What is the definition of efficiency regarding work?

A Work output / Work input
B Work input / Work output
C Work input + Work output
D Work input - Work output

4 A wedge is considered to be what type of simple machine?

A Single inclined plane
B Double inclined plane
C Lever
D Wheel and axle

5 What is the name for the separation between each thread in a screw?

A Gap
B Margin
C Pitch
D Depth

6 For a wheel and axle with a wheel radius of 30 cm and an axle radius of 5 cm, what is the velocity ratio?

A 5
B 6
C 150
D 0.16

7 What is the mechanical advantage of a lever that lifts a 100 N load with 20 N of input force?

A 2
B 4
C 5
D 2000

8 Which of the following is NOT a type of simple machine?

A Lever
B Pulley
C Wedge
D Battery

9 Why is the Actual Mechanical Advantage (AMA) usually less than the Ideal Mechanical Advantage (IMA)?

A Due to friction
B Due to gravity
C Due to density
D Due to air pressure

10 How many classes of levers are there?

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