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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Two masses 2m and m are connected by an inextensible light string. The string is passing over a light frictionless pulley. The mass 2m is resting on a surface and mass in is hanging in air as shown in Fig. A particle of mass in strikes the mass in from below in case (I) with a velocity v0 and in case (II) strikes mass in with a velocity v0 from top and sticks to it.

Two masses 2m and m are connected by an inextensible light string. The string is passing over a light frictionless pulley. The mass 2m is resting on a surface and mass in is hanging in air as shown in Fig. A particle of mass in strikes the mass in from below in case (I) with a velocity v0 and in case (II) strikes mass in with a velocity v0 from top and sticks to it.

A glass ball collides with a smooth horizontal surface (xz plane) with a velocity V=ai-bj. If the coefficient of restitution of collision be e the velocity of the ball just after the collision will be