Question

a ball of mass 200 g strikes perpendicularly with a vertical wall with a speed 20m/s and rebounds with same speed along same line. calculate the impulse imported to the ball​

Answer 1

change in velocity is 20, as such when the ball hits the wall the final speed v will become 0 ,

v - u =20 - 0 =20

impulse = mass  x  change in speed

             =  0.2 kg x 20

             =  4kgm/s