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JEE PHYSICS MCQ: WORK-ENERGY-POWER
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One object of mass is moving with speed in west direction and another object of mass is moving with in north direction. Both collide and stick together. Choose the correct alternative.
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Correct option: C
Their momentum is conserved as it is inelastic collision.
Option C (Their momentum is conserved as it is inelastic collision) is correct because in an inelastic collision, kinetic energy is not conserved, but momentum is always conserved.
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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.