What is mechanical advantage?
Factor by which a machine multiplies the effort force
.

How do you find the mechanical advantage of most simple machines?

You multiplies the effort

How can you find the mechanical advantage of levers?
Use effort arm and resistance arm to determine the mechanical advantage of a lever

What is the mechanical advantage of a lever with and effort arm of 16cm and resistance arm of 2cm? 34 cm

A machine has a mechanical advantage of 4. Your effort force is 10 newtons. What is the resistance force? 40 effort