1.

A smooth sphere of mass m is moving on a horizontal plane with a velocity 3hat(i) + hat(j) when t collides with a vertical wall which is parallel to the vector hat(j). If the coefficiet of restitution between the sphere and the wall is 1/2 The velocity of the sphere after impact is

Answer»

`(3)/(2)HAT(i) + hat(j)`
`-(3)/(2)hat(i) + hat(j)`
`-(3)/(2) hat(i) - hat(j)`
`(3)/(2)hat(i) - hat(j)`

Answer :B


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