EXERCISES
Jharkhand Board Physics Solutions for EXERCISES
Simple step-by-step solutions to EXERCISES questions of Work, Energy and Power from PHYSICS PART 1 TEXTBOOK FOR CLASS XI. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from EXERCISES with Hints & Solutions
The sign of work done by a force on a body is important to understand. State carefully if the following quantity is positive or negative:
Work done by gravitational force in lifting a bucket out of a well by means of a rope tied to the bucket.
The sign of work done by a force on a body is important to understand. State carefully if the following quantity is positive or negative:
Work done by friction on a body sliding down an inclined plane.
The sign of work done by a force on a body is important to understand. State carefully if the following quantity is positive or negative:
Work done by an applied force on a body moving on a rough horizontal plane with uniform velocity.
The sign of work done by a force on a body is important to understand. State carefully if the following quantity is positive or negative:
Work done by the resistive force of air on a vibrating pendulum in bringing it to rest.
Select the correct alternative: When a conservative force does positive work on a body, the potential energy of the body _____.
State if the given statement is true or false. Give reasons for your answer.
Total energy of a system is always conserved, no matter what internal and external forces on the body are present.
State if the given statement is true or false. Give reasons for your answer.
Work done in moving a body over a closed loop is zero for every force in nature.
State if the given statement is true or false. Give reasons for your answer.
In an inelastic collision, the final kinetic energy is always less than the initial kinetic energy of the system.
