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JEE PHYSICS MCQ: WORK-ENERGY-POWER
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Which of the following option is not correct for inelastic collision:
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Correct option: D
Velocity of seperation may be greater than velocity of approach
Option D (Velocity of separation may be greater than velocity of approach) is correct because in an inelastic collision, kinetic energy is not conserved, and the velocity of separation is always less than the velocity of approach.
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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.