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JEE PHYSICS MCQ: WORK-ENERGY-POWER
1
Medium
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Understanding
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Statement I: Both stretched and compressed springs possess potential energy.
Statement II: Work done against restoring force is stored as potential energy.
Statement II: Work done against restoring force is stored as potential energy.
View answer and explanation
Correct option: A
If both Statement - I and Statement - II are true, and Statement - II is the correct explanation of Statement - I
Option A (If both Statement - I and Statement - II are true, and Statement - II is the correct explanation of Statement - I) is correct because both stretched and compressed springs store potential energy due to the work done against the restoring force.
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Reason: Force and displacement are perpendicular to each other. 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. A 2.0 kg block is dropped from a height of 40 cm onto a spring of spring constant . Find the maximum distance the spring is compressed
