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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

The collision of two balls of equal mass takes place at the origin of coordinates. Before collision, the components of velocities are ( and ) and ( and ). The first ball comes to rest after collision. The velocity (components and respectively) of the second ball are

Answer: (A)

Solution

Momentum conservation with equal masses and the first ball at rest afterwards: and $ = 0 + 30 = 30\

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Question ID VK-062373