State the relation between the kinetic energy and momentum of a body.
Important Questions on Work, Energy and Power
State the sign of Work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket.
State the sign of work done by the gravitational force when a man is lifting a bucket out of a well by means of a rope tied to the bucket.
What is the sign of work done by friction on a body sliding down on inclined plane.
State the sign of work done by gravitational force on a body sliding down on an inclined plane.
State the sign of work done by a force on a body moving on a rough horizontal plane with uniform velocity.
State the sign of work done by the resistive force of air on a vibrating pendulum in bringing it to rest.
State whether the following statement is true or false. Give reason in support of your answer.
The total energy of a system is always conserved, no matter what internal and external forces on the body are present.
State whether the following statement is true or false. Also, Give a reason to support your answer.
The work done by earth's gravitational force in keeping the moon in its orbit for its one revolution is zero.
