Work and machine

When you exert a force on an object that causes the object to move some distance.

• work

• power

• motion

• electricity

An inclined plane wrapped around a rod forms this simple machine 

• lever
• pulley
• screw
• wedge 

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

• wedge
• screw
• lever
• inclined plane 

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 

A device that has two or more simple machines working together 

• fulcrum 
• pulley
• compound (complex) machine 
• motor 

Name this simple machine. 

• Pulley
• Wheel and Axle
• Inclined Plane
• Lever

If you push against an object and it doesn't move, are you doing work?

• No

• Yes

In order for work to be done, what two things need to happen?

• Object needs to move in any direction

• Object needs to have acceleration and speed

• Object must move and must move in the direction of the force applied

• Object needs to feel force, it doesn't matter if it moves