Back to WORK-ENERGY-POWER
JEE PHYSICS MCQ: WORK-ENERGY-POWER
1
Medium
1 of 1
Analyzing
+4 | -1
Statement-I: When a body is rotated along a vertical circle with uniform speed then the sum of its kinetic energy and potential energy is constant at all positions
Statement-II: To make a body to move along a vertical circle, its critical speed at a point is independent of mass of body
Statement-II: To make a body to move along a vertical circle, its critical speed at a point is independent of mass of body
View answer and explanation
Correct option: C
Statement-I is false, Statement-II is true
Option C is correct. The total mechanical energy (KE + PE) is not constant when speed is not uniform. The critical speed at a point is independent of the mass of the body.
More Questions from WORK-ENERGY-POWER
Practice All Chapter MCQs →
A ball throwing cannon, lifts ball and throws with Speed. If balls are raised upto . then find Input power of cannon if it lifts 8 balls per minute and its efficiency is . Mass of each ball is .
Assertion:When a particle moves in a circle with a uniform speed its acceleration is constant but the velocity changes.
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.
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.