For what system is the work always zero?

It is zero only when the force (and the system) is conservative. Physically a system can not be conservative if friction or other dissipation forces are present for F. ds due to friction is always positive and the closed integral ∮F.

Is work done by normal force always 0?

No, the work done by normal forces is not always zero. In fact many common situations involve a normal force doing work. Example 1: Push a box so that it moves in the direction in which you push it.

Can work done by internal forces be positive?

The force is to the left and the displacement is to the left. F and d are in the same direction. Thus, positive work is done. Kinetic energy.

Which process net work done is zero?

Isochoric process
Isochoric process: It is a thermodynamic process which takes place at constant volume. In such a process, the work done is zero.

What is the net work done on the system?

Net work done is defined as the change in the kinetic energy on an object.It is related to the work energy theorem which says that the work done byh a force on a moving body is equal to the increase in its kinetic energy.It is measured by the formula:- W =1/2mv^2-1/2mu^2.

Is work done by normal force?

Normal force acts perpendicular and therefore does no work. The weight acts perpendicular to the direction of motion and does no work.

Under what condition work done by gas is zero?

An isobaric expansion of a gas requires heat transfer to keep the pressure constant. An isochoric process is one in which the volume is held constant, meaning that the work done by the system will be zero. The only change will be that a gas gains internal energy.

Is work net force?

The net work equals the sum of the work done by each individual force. The forces acting on the package are gravity, the normal force, the force of friction, and the applied force. The normal force and force of gravity are each perpendicular to the displacement, and therefore do no work. The applied force does work.

What is the work done by internal forces on a system?

Total work done by internal forces on a system is always zero Since internal forces always have equal magnitudes and opposite directions, the work done by one internal force cancels the work done by its equal and opposite internal forces. In other words, the resultant work done by the pair of internal forces is zero. Answer verified by Toppr

Is the work done by 2 internal forces always zero?

Since the work also depends on the relative displacement of the two pointmasses in the material system, the work provided by these 2 internal forces will generally not be equal to zero. Other sources claim that the work done by internal forces is always zero.

How does the work done by each force depend on distance?

The work done by each force depends on the distance, through which, each of the forces acts. The center of mass can move up, or down, or not at all. That doesn’t matter. The work by each force is equal to that force multiplied by the distance, through which, that force acts.

Can internal force change linear momentum?

From newton’s second law Fnet​=dtdP​. Since, Net internal force is always zero, So change in momentum is also zero. i.e. Momentum will remain conserved. Therefore, Internal force can not change linear momentum. Hence, Option C is correct