Ball A has a mass of 5.0 kg. ball B has twice the mass of ball A. The Two balls collide and stick together in a perfectly inelastic collision. after the collision the combined balls are at rest. if the velocity of ball A before the collision was 13 m/s, what was the velocity of ball B before the collision?

A. 6.5

B. - 6.5 m/s

C. 26 m/s

D. - 13 m/s

E. 0.0 m/s

Question

8 June, 11:05

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Answers (1)

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Haylie Cisneros · Answer 1

Ma. Va + Mb. Vb = (Ma+Mb) Vc

Vc=0

(5) (13) + (10) (Vb) = 0

65+10Vb = 0

Vb = - 65/10

Vb = - 6.5m/s

Answer = B