Question

Two objects cach of mass 5 kg moving in a same straight line with velocity of 4 m/s and 2 m/s respectively towards each other. They stick together after collision, What will be the velocity of combined object aller collision ?​

Answer 1

Answer:

3 m/s

Explanation:

Mass of each ball = 5 kg

Assume final velocity is v

Final mass = 5 + 5 = 10 kg as they stick together

Conservation of momentum says that

Initial momentum = Final momentum

Initial momentum = 5x4 + 5x2 = 20 + 10 = 30 m/s  ___(1)

(No need to take minus sign because momentum is the amount of motion possessed by body )

Final momentum = 10 v ___(2)

(1) = (2)

10 v = 30

v = 3 m/s

Hope it helps