Question

A 2kg object is moving with speed 5ms. then hits a

wall in 0.5s before reversing its direction with a speed of 2ms
a. Calculate the impulse​

Answer 1

Given :

A 2kg object is moving with speed 5m/s. then hits a wall in 0.5s before reversing its direction with a speed of 2m/s.

To Find :

The impulse.

Solution :

Impulse can be calculated by change in momentum :

`I = mv_f - mv_i\\\\I = 2*( -2 + 5 )\ kg \ m/s\\\\I = 6 \ kg \ m/s`

Therefore, the impulse is 6 kg m/s.