Physical Science 14.4

Multiple Choice

A bar that is rotating about a fixed point is called a

• fulcrum

• lever

• wedge

• compound machine

Multiple Choice

A 3-meter-long ramp is used to lift a piano to a moving truck, which is 1 meter off the ground. What is the ideal mechanical advantage of the ramp?

• 1

• 2

• 3

• 33

Multiple Choice

A machine, such as a bicycle, that combines many simple machines is known as a complex machine.

• true

• false