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JEE PHYSICS MCQ: WORK-ENERGY-POWER
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A particle of mass collides head-on with another stationary particle of mass such that the second particle starts moving and the first particle comes to rest after the collision. Which of the following conditions is valid if the coefficient of restriction is ?
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Correct option: B
Option B () is correct because the coefficient of restitution is the ratio of velocities, which equals and must be less than or equal to 1.
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Reason: Angular displacement is not an axial vector. A body of mass thrown vertically upwards attains a maximum height . As what height will its kinetic energy be of its initial value? Assertion: Centripetal force does no work.
Reason: Force and displacement are perpendicular to each other. Statement I: Both stretched and compressed springs possess potential energy.
Statement II: Work done against restoring force is stored as potential energy. A bullet of mass moving at a speed hits a ball of mass kept at rest. A small part having mass breaks from the ball and sticks to the bullet. The remaining ball is found to move at a speed in the direction of the bullet. Find the velocity of the bullet after the collision.