Two solid balls A and B having masses 200 g and 400 grespectively are moving in opposite direction with velocity of A equal to 0.3 m//s. After the collision the two balls come to rest. The velocity of B before collision is :

Two solid balls A and B having masses 200 g and 400 grespectively are

1.	Two solid balls A and B having masses 200 g and 400 grespectively are moving in opposite direction with velocity of A equal to 0.3 m//s. After the collision the two balls come to rest. The velocity of B before collision is :
Answer» `- 0.15 m//s` `1.5 m//s` `0.1 m//s` zero Solution :Hence (B) is the RIGHT CHOICE. 107. Initial momentum = Final momentum `m_(1)u_(1)+m_(2)u_(2)=(m_(1)+m_(2))0` `u_(2)=(-200xx0.3)/(400)=-0.15m//s` Hence correct choice is (a).

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Two solid balls A and B having masses 200 g and 400 grespectively are moving in opposite direction with velocity of A equal to 0.3 m//s. After the collision the two balls come to rest. The velocity of B before collision is :

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