Page 51 - Science Course 2 (Book 2)

Mo9-L2a: What are Simple Machines?

Let’s Begin A wheel and axle is a

simple machine that is a
Machines Transfer Mechanical Energy shaft attached to a wheel
of a larger diameter so
that both rotate together.
Many machines transfer mechanical energy from
one object to another.

Simple machines are machines that do work using
one movement.
A pulley is a grooved
wheel with a rope or
cable wrapped around it.

Wedge Lever
Pulley

Key Concept

Screw Wheel Wedge What are Simple Machines?
Simple machines do not change the amount of work What are examples of simple machines?
required to do a task; they only change the way work
is done.

A simple machine can be an inclined plane, a screw,
a wedge, a lever, a pulley, or a wheel and axle.

An inclined plane is a
f at, sloped surface.

A screw is an inclined plane SUMMARY
wrapped around a cylinder.
What are Simple Machines?

A bottle opener is a simple machine.
There are six types of simple machines, and a
ramp is one example.
A wedge is an
inclined plane that
moves.

A lever is a simple
machine that pivots
around a f xed point

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