Question

Question A Ball A of mass m 1 travelling with a velocity u 1 collides with another Ball B of mass m 2 at rest. After collision the velocity of Ball A changes to v 1 and velocity of Ball B changes to v 2 . If the momentum is conserved, which option correctly relates the momentum before and after the collision?

(a) (m 1 . u 1 ) + (m 1 . v 1 ) = (m 2 . v 2 )
b) (m 1 . u 1 ) = (m 1 . v 1 ) + (m 2 . v 2 )
(c) (m 2 . v 2 ) − (m 1 . u 1 ) = (m 1 . v 1 )
d) (m 1 . u 1 ) = (m 1 . v 1 ) − (m 2 . v 2 )​

Answer 1

Answer:

(b)  (m 1 . u 1 ) = (m 1 . v 1 ) + (m 2 . v 2 )

Explanation:

law of conservation of momentum states that momentum before collision = momentum after collision

therefore m1.u1 = (m1.v1) + (m2.v2)  

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