Page 50 - Science Course 2 (Book 2)

Explaining Machines Mo9-L2a: What are Simple Machines?

Lesson 2

wedge
In this topic, you will learn the following is an inclined plane that moves.
lessons:
Mo.9–L2a: What are Simple Machines?
Mo.9–L2b: What are Complex Machines?
Mo.9–L2c: What is Mechanical Ef ciency?

Mo9-L2a What are Simple Machines? lever

is a simple machine that pivots around a f xed point.
KEY CONCEPTS:
1. What are simple machines?

Vocabulary A-Z

Let us learn some vocabulary

simple machine pulley
is machine that does work using one movement. is a grooved wheel with a rope or cable wrapped
around it.

Pulley Lever Wheel and Axle

Wedge Inclined Plane Screw

inclined plane wheel and axle
is a f at, sloped surface. is a simple machine that is a shaft attached to a
wheel of a larger diameter so that both rotate
together.

screw
is an inclined plane wrapped around a cylinder.

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