Lesson 3 - Simple Machines

Simple machines make the work we have to do easier, but it is still the same amount of work.

• True

• False

Name this simple machine. 

• Pulley
• Wheel and Axle
• Inclined Plane
• Lever

Name this simple machine ideal for loading and moving furniture.

• Inclined Plane

• Lever

• Pulley

• Wedge

Which choice is an example of a lever?

• Axe
• Seesaw
• Bottle Cap
• Tunnel

Which is not a type of simple machine?

• spring

• screw

• pulley

• wedge

Two or more simple machines that operate together form is called a ________________.

• complicated machine

• compound machine

• comprehensive machine

• constructive machine

Which is a simple machine?

• baseball bat

• bicycle

• can opener

• car

Which of the following is NOT true about compound machines?

• They make work easier

• They consist of two or more simple machines

• They perform less complex functions than simple machines

• A stapler is an example of a compound machine

A pulley makes work easier by changing the direction of force.

• True

• False

A lever can decrease the force needed to raise an object. So it increases the __________ you must apply that force.

• weight

• force

• distance

• power