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Sahay Sir > Question Answers > Arihant Physics by D.C Pandey > Volume 1 > Chapter 8 - COM, Momentum and Collision > A smooth sphere is moving on a horizontal surface with velocity vector 2i +2j ​ immediately before it hits a vertical wall. The wall is parallel to j ​ vector and the coefficient of restitution between the sphere and the wall is e=1/2. The velocity vector of the sphere after it hits the wall is

A smooth sphere is moving on a horizontal surface with velocity vector 2i +2j ​ immediately before it hits a vertical wall. The wall is parallel to j ​ vector and the coefficient of restitution between the sphere and the wall is e=1/2. The velocity vector of the sphere after it hits the wall is

A metre rule weighing 100 g rests on a table with a part projecting over the edge. the length of the part projecting out if a 5 g body hung at the end just tills the rule is .