Answer:
2.4 kg m/s
Explanation:
For change in momentum we have to find out initial and final momentum ,
So , change in momentum = final momentum - initial momentum
As momentum is vector so we have to take the direction also
Final momentum = 0.12 kg * 14 m/s = 1.68 kg m/s
Initial momentum = - 0.12 kg * 6 m/s = - 0.72 kg m/s
(Negative sign is due to change in direction)
So , change in momentum = 1.68kg m/s - ( - 0.72 kg m/s)
= (1.68 + 0.72)kg m/s
= 2.4 kg m/s
