Work, Power, Simple Machines Review

Front

The bat above is a _______ class lever with a mechanical advantage ______

Back

third, less than 1

Front

It took 100 J to push a chair 5 m across the floor. With what force was the chair pushed?

Back

20N

Front

The pivot point of a lever is called a(n) ________.

Back

fulcrum

Front

What simple machine is this? Options: incline plane, wedge, lever, pulley

Back

wedge

Front

What simple machine is this?

Back

A pulley

Front

What simple machine is this?

Back

lever

Front

What is the effort force needed to lift a 3000 N rock, using a jack with a MA of 10?

Back

300N

Front

Which class of lever is this?

Back

First Class Lever

Front

If a 10 watt hairdryer takes 100 seconds to dry your hair, how much work has it done?

Back

1000J

Front

______ is a bar that is free to pivot, or turn about a fixed point.

Back

lever