The work done by all the forces (externa...

The work done by all the forces (external and internal) on a system equals the change in

total energy

kinetic energy

potential energy

none of these

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The negative of the work done by the conserative internal forces on a system equals the change iln

The work done by the external forces on a system equals the change in

S_(1): If the internal forces within a system are conservative, then the work done by the external forces on the system is equal to the change in mechanical energy of the system. S_(2): The potential energy of a particle moving along x- axis in a conservative force field is U=2x^(2)-5x+1 is S.I. units. No other forces are acting on it. It has a stable equalibrium position at one point on x- axis. S_(3) : Internal forces can perform net work on a rigid body. S_(4) : Internal forces can perform net work on a non - rigid body.

Statement -1: The work done by all forces on a system equals to the change in kinetic energy of that system . This statement is true even if nonconservative forces act on the system. Statement -2: The total work done by internal forces may be positive.

STATEMENT-1: Work done by the net force acting on a particle is equal to the change in its kinetic energy. STATEMENT-2: Change in potential energy is always equal to the work done by external forces. STATEMENT-3: Work energy theorem is not applicable, if the work is done by the non-conservative forces

According to the work energy theorem, the work done by the net force on a particle is equal to the change in its

A given system undergoes a change in which the work done by the system equals to the decrease in its internal energy. The system must have undergone an

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