Machines

Which of the following is NOT a simple machine?

• lever
• pulley
• inclined plane
• ring

What two things does a lever change?

• size and speed
• force and effort
• direction and amount of force
• direction and speed

An example of a lever in every day life is

• Doorknob
• Steering wheel on a car
• Screw
• Seesaw

For a lever to be a first class lever the fulcrum needs to be ..

• between the load and the effort
• on one side and the load and effort on the other side 
• on the same side as the load arm. 

A light bulb is an example of a(n)

• wedge
• pulley
• incline plane
• screw

Stairs are an example of a(n)

• wedge
• pulley
• inclined plane
• wheel and axle

A sloping force, like a ramp, that reduces the mount of force required to lift an object.

• screw
• wheel and axle
• inclined plane

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

Which of the following is NOT an example of a compound machine?

• bicycle
• stairs
• lawn mower

This device

• wedge
• lever
• incline plane
• wheel and axle