A boy im50kg at rest on a skateboard is pushed by another boy who exerts a force of 200 N on him. If the first boy's final velocity is 8 m/s, what was the contact time?
seconds

Time, t = 2 seconds

Explanation:

Given the following data;

Mass, m = 50 kg

Initial velocity, u = 0 m/s (since it's starting from rest).

Final velocity, v = 8 m/s

Force, F = 200 N

To find the time, we would use the following formula;

Making time, t the subject of formula, we have;

Substituting into the formula, we have;

Time, t = 2 seconds