Problema Solution
. A ball of mass 1kg moving to the left at a speed of 25 m/s suffers an elastic collision with a fixed vertical wall and comes backward with the same speed. a. Find the impulse of the ball b.
Answer provided by our tutors
A. Impulse = Change in Momentum.
Change in Momentum = Mass * change in velocity = - 1 * (25 - (-25)) = - 50 Ns (minus sign indicates that the impulse was in a direction opposite to the original direction of motion. Also kg m/s = Ns)
B. Force = Impulse/ time = - 50/ .15 = 333.3 N