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JEE Main202116 Mar 2021Morning ShiftPhysicsRotational MotionActual

A ball of mass 10 kg moving with a velocity 10 3 m s - 1 along X -axis, hits another ball of mass 20 kg which is at rest. After the collision, the first ball comes to rest and the second one disintegrates into two equal pieces. One of the pieces starts moving along Y -axis at a speed of 10 m s - 1 . The second piece starts moving at a speed of 20 m s - 1 at an angle θ (degree) with respect to the X -axis. The co

Correct answer

0

Step-by-step solution

Before Collision After Collision From conservation of momentum along x axis; P → i = P → f 10 × 10 3 = 200 cos θ cos θ = 3 2 θ = 30 °

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