Question

A ball of mass 0.1 kg strikes a wall normally with a speed of 30 m/ s and rebounds with a speed of 20 m/s . The magnitude of change in momentum of the ball is

Answer 1

Answer:

The magnitude of change momentum is 1 kg m/s

Step-by-step explanation:

A ball of mass 0.1 kg strikes a wall normally with a speed of 30 m/ s and rebounds with a speed of 20 m/s.

Mass = 0.1 kg

Initial velocity, u = 30 m/s

Final velocity, v = 20 m/s

We need to find the change in momentum of the ball.

Change in momentum = Final momentum - Initial momentum

                                      = mass x final velocity - Mass x initial velocity

                                     = 0.1(20-30)

                                     = 1 kg m/s

Hence, The magnitude of change momentum is 1 kg m/s

Answer 2

Step-by-step explanation:

follow equation m( v-u)