Question

a body of mass moving with a velocity of 40m/s collides with another body at rest. if the two bodies move together with a velocity of 25m/s . find the mass of the other body?​

Answer 1

Initial momentum of the system = m1 * 40 + m2 * 0

Final momentum of the system = (m1 + m2) * 25

By the law of conservation of momentum

Initial momentum = Final momentum

40 m1 = 25 ( m1 + m2)

15 m1 = 25 m2

$\frac{ {m1}}{m2} = \frac{5}{3}$

Ratio of two masses = 5:3

If any one of the mass is known we can find the other mass.

( I think, may be data insufficient. not sure)