Simple Machines

Picture 5 shows a lid being twisted on to a jar. This is an example of what type of machine?

• screw
• lever
• inclined plane
• wheel and axle

How can an incline plane reduce the amount of force required to lift an object?

• increase the length of the ramp
• increase the height of the ramp
• decrease the length of the ramp

This device

• wedge
• lever
• incline plane
• wheel and axle

What is this an example of?

• wheel and axle
• lever
• inclined plane
• pulley

A force is a _________ or ________ that acts on an object.

• hot, cold
• push, pull
• temperature, mass

A simple machine is...

• made up of one or two parts
• made up of more than two parts
• also called a complex machine

What simple machine is pictured?

• inclined plane
• screw
• wedge

A simple machine consisting of a rope or cable that runs around a grooved wheel.

• wheel and axle
• wedge
• pulley

A circular object attached to a bar is a...

• screw
• lever
• wheel and axle

Mr. Smith uses a ramp to load a heavy box onto the back of his truck. By using the ramp, instead of just lifting the box, Mr. Smith ____________.

• needs to do less force
• does less work
• has a harder job to do
• does more work