Question

a. ball moving with momentum of 15 kgm/sec strikes against wall at an angle of 30 ^ reflected back with same momentum. calculate impulse.

Answer 1

If we assume it reflects back with same angle then,
Impulse = Change in momentum
= p - (-p)
= 2p
= 2mvCos30
= 2 × 15 × √3 / 2
= 15√3 kgm/s

Answer 2

"The answer to this question is 15√3 kgm/s. If we consider it reflects back with similar angle, the impulse will be the change in momentum.  It is written as p - (-p)

Impulse = 2p

Once we apply the values, we can get

Impulse = 2mvCos30

= 2 × 15 × √3 / 2

The value of impulse is 15√3 kgm/s

"