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Standard XII

Physics

Partially Inelastic Collision

Two masses 2m...

Question

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 m is hanging in air as shown in figure. A particle of mass m strikes the mass m from below in case (I) with a velocity $v_{0}$ and in case (II) strikes mass m with a velocity $v_{0}$ from top and sticks to it

the conservation linear momentum can be applied in both the cases just before and just after collision.

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the conservation of linear momentum can be applied in case I but cannot be applied in case II just before and just after collision.

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the ratio of velocities of mass m just after collision in first and second cases is 1/2.

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the ratio of velocities of mass m just after collision in first and second case is 2.

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Solution

The correct options are
B the conservation of linear momentum can be applied in case I but cannot be applied in case II just before and just after collision.
D the ratio of velocities of mass m just after collision in first and second case is 2.

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