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The work done by the external forces on ...

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

A

Kinetic energy only

B

Potential energy only

C

Thermal energy only

D

None of these

Text Solution

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The correct Answer is:
A
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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.

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Work done by the conservative force on a system is equal to :