Question

A 200 g ball moving at 5 m/s strikes a wall perpendicular and rebounds elastically at the same speed. The impulse given the wall is

Answer 1

Impulse in physics is the integral of force, F, with respect with time, t. This value is a vector quantity since force is a vector quantity as well. It can be calculated from the product of force and time. We do as follows:

Impulse = Ft
= m(a)(t)
= m(v/t)t
= mv
= .200 (5)
= 1 N-s