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JEE PHYSICS MCQ: WORK-ENERGY-POWER
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Medium
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Analyzing
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Statement-1: Linear momentum is conserved only during an elastic collision between two finite particles
Statement-2: The collision is infact a redistribution of the total momentum of the particles.
Statement-2: The collision is infact a redistribution of the total momentum of the particles.
View answer and explanation
Correct option: D
Statement-1 is false, Statement-2 is true
Option D is correct because Statement-1 is false, as linear momentum is conserved in all collisions (elastic and inelastic) in a closed system, and Statement-2 is true, as collision is a redistribution of total momentum.
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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.