Question

12. You want to use a lever to lift a 2000 N rock. The maximum force you can exert is 500 N. Draw a lever that will allow you to lift the rock. Label the input force, output force, fulcrum, input arm, and output arm. Specify measurements for the input and output arms. State the mechanical advantage of your lever.

Answer 1

For the lever to work, your force multiplied by the input arm should be equal to the rock's weight multiplied by the output arm. Therefore:
500I = 2000O
I/O = 4

The input and output arms should be in the ratio 4 : 1