Simple machines and work

A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.  

• wedge
• screw
• lever
• inclined plane 

An inclined plane wrapped around a rod forms this simple machine 

• lever
• pulley
• screw
• wedge 

A simple machine that consists a rigid bar that pivot about a fixed point

• lever
• pulley
• wheel and axle
• fulcrum 

An axe is an example of a

• pulley
• inclined plane
• screw
• wedge 

A seesaw is an example of a  

• wedge
• lever 
• inclined plane 
• pulley 

Stairs

• wedge
• pulley
• inclined plane
• wheel and axle

Tags

NGSS.MS-ETS1-1

Lightbulb

• wedge
• pulley
• incline plane
• screw

Which is not a type of simple machine?

• spring
• screw
• pulley
• wedge

This device

• wedge
• lever
• incline plane
• wheel and axle

What type of simple machine is this?

• wheel and axle
• gear
• lever
• inclined plane