The pedals on a bicycle give a mechanical advantage by allowing you to turn the pedals a distance to turn the circumference of the wheels. a) long, larger b) long, shorter c) short, larger d) short, shorter

C.) Short, Larger

The pedals on a bicycle give a mechanical advantage by allowing you to turn the pedals a short distance to turn the larger circumference of the wheels

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.