Question

Two balls A and B of masses 4m and 8m are in motion with velocities 2v and 3v respectively. Compare the momentum of ball A with ball B.​

Answer 1

Answer:

Momentum of ball A = 4m × 2v = 8mv

Momentum of ball B = 8m × 3v = 24mv

Clearly momentum of ball B is 3 times the momentum of ball A.

Also ratio of momenta of ball A to ball B is 1 :3.

Answer 2

Answer:

P1=8,P2=24

Explanation:

momentum (P)=mass×velocity.

for ball A ,P=4×2=8 kg-m/s

for ball B ,P=8×3=24 kg-m/s

Thus ball B requires more time to bring it to rest by a constant force than time needed for ball A ,as P1<P2