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JEE PHYSICS MCQ: WORK-ENERGY-POWER
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The potential energy of a body is given by
where is in joule and in metre. Deduce the and components of the force (in newton) on the body when it is in position
where is in joule and in metre. Deduce the and components of the force (in newton) on the body when it is in position
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Correct option: D
Option D () is correct because it's calculated by taking the negative partial derivatives of the potential energy with respect to x, y, and z.
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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.