Bill Nye: Simple Machines

Wheels, ramps, and pulleys are all forms of what type of machines?

Simple machines can help us change the __________ and direction of forces.

What is the point around which a lever moves called?

Your forearm is or is not an example of a lever?

A spiral staircase functions as a(n) __________.

Pulleys make things easier or harder because they spread the work.

Cable cars are operated by a lot of levers and __________.

On a boat, pulleys are used to raise and lower __________.

A door knob would be an example of which type of simple machine?