Question

two bodies of masses 1 kg and 2kg are moving parallel to a line in the same direction,at a velocity of 2m/s and 1 m/s respectively both the bodies collide with each other after collision,the velocity of the first body becomes 1.5m/s find the velocity of the second body after collision.​

Answer 1

Explanation:

m1=1kg m2=2kg

u1=2m/s u2=1m/s

v1=1.5m/s v2=?

In Law of conservation of momentum,

m1u1+m1v1=m2u2+m2v2

(1×2)+(1×1.5)=(2×1)×(2×v2)

2+1.5=2+2v2

3.5=4v2

3.5/4=v2

v2=0.875m