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

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