Can work be done by a system without changing its volume?

Can momentum of a system be changed without changing its kinetic energy ? Give example.

Can Kinetic energy of a system be changed without changing its momentum ?

Unit of work done

The net work done by the system ____

The work done by the torque is

We consider a thermodynamic system. If DeltaU represent the increase in the its energy and W the work done by the system, which of the following statements is true?

The total work done on a particle is equal to the change in its kinetic energy

consider two processes on a system as shown in fig the volumes in the initial stage are the same in the two processes and the volume in the final stage are also the same.Let DeltaW_(1) and DeltaW_(2) be the work done by the system in the processes A and B respectively.

A system can be taken from the initial state p_(1),V_(1) to the final state p_(2,V_(2) by two different methods, let DeltaQ and DeltaW represent the heat given to the system and the work done by the system. Which of the following must be the same in both the method?