A ball of mass 1kg strikes a wedge of ma...

A ball of mass 1kg strikes a wedge of mass 4kg horzontally with a velocity of `10m//s`. Just after collision, velocity of wedge becomes `4m//s`.Friction is absent everywhere and collision is elastic. Select the correct alternative.

speed of ball after collision is `12m//s`

speed of ball after collision is `8m//s`

impulse between ball and wedge during collision is 16N-s

impulse between ball and wedge during collision is 32N-s

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