Question

A body of mass 2kg collides with a wall with speed 100m/s and rebounds with same speed if the time of contact was 1/50 sec. The force excerted on the wall is

Answer 1

Answer:

10000 N

Explanation:

f = ma

a = v - u / t

a = 0 - 100/ 1/50 as initial speed is 100 m/s but 0 when hit the wall

a = -100 * 50

a = - 5000

f = 2 * - 5000 = - 10000 N