MEDIUM
JEE Main
IMPORTANT
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The work done by the external forces on a system equals the change in

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Important Questions on Work and Energy

EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 8 - Work and Energy>OBJECTIVE I>Q 6
The work done by all the forces (external and internal) on a system equals the change in
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 8 - Work and Energy>OBJECTIVE I>Q 7

____________ of a two particle system depends only on the separation between the two particles.

The most appropriate choice for the blank space in the above sentence is

HARD
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 8 - Work and Energy>OBJECTIVE I>Q 8
A small block of mass m is kept on a rough inclined surface of inclination θ fixed in an elevator. The elevator goes up with a uniform velocity v and the block does not slide on the wedge. The work done by the force of friction on the block in time t will be
MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 8 - Work and Energy>OBJECTIVE I>Q 9
A block of mass m slides down a smooth vertical circular track. During the motion, the block is in
MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 8 - Work and Energy>OBJECTIVE I>Q 10
A particle is rotated in a vertical circle by connecting it to a string of length l and keeping the other end of the string fixed. The minimum speed of the particle when the string is horizontal, for which the particle will complete the circle is
MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 8 - Work and Energy>OBJECTIVE II>Q 1
A heavy stone is thrown from a cliff of height h in a given direction. The speed with which it hits the ground
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 8 - Work and Energy>OBJECTIVE II>Q 2
The total work done on a particle is equal to the change in its kinetic energy
MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 8 - Work and Energy>OBJECTIVE II>Q 3
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that