Nature Of The Work Done

Nature Of Work Done|Positive Work Done|Negative Work Done|Energy|Important Points|Summary

Is it true for every force in nature that the work done by it on the undergoing motion in a closed loop is always zero?

In which of the following, the work done by the mentioned force is negative ? The work done by

Consider the following figure and tell the nature of work done.

Consider the following figure andtell the nature of work done.

A body P is on a body Q and moving with it. Comment on the nature of work done by frinction on body P and on body Q at their contact surface

A gas filled in a cylinder fitted with a movable piston is compressed. What is the nature of work done by the applied force?

A beaker containing water at 373 K is representig an open system, is placed in the room. Predict the nature of work done.

Four charges are placed at four corners of a square as shown in figure. The side of the square is a. Two charges are positive and two are negative, but their magnitudes are the same. Now, an external agent starts decreasing all the sides of the square slowly and at the same rate. What happens to the electrical potential energy of the system and what will be the nature of work done by the agent?

Assertion : A work done in moving a body over a closed loop is zero for every force in nature. Reason : Work done does not depend on nature of force.