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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

total energy

B

kinetic energy

C

potential energy

D

none of these

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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.

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.

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

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

If no external force acts on a system

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

ANURAG MISHRA-WORK AND ENERGY-Level 1
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  2. The negative of the work done 'by the conservative internal forces on ...

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

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  4. The work done by all the forces (external and internal) on a system eq...

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  5. of a two particle system depends only on the separation between the tw...

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  6. A block of mass m slides down a smooth vertical circular track. During...

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  8. In the shown diagram mass of A is m and that of B is 2 m. All the surf...

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  9. In above question, speed of block A, when the extension in spring is (...

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  11. A block of mass m is pulled by a constant powert P placed on a rough h...

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  13. A pendulum of mass 1 kg and length  = 1m is released from rest at ang...

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  14. A system consists of two identical cubes, each of mass m, linked toget...

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  15. In the shown figure, the mass in sticks to the string just after it st...

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  16. A circular tube of mass M placed veticlly on a horizontal surface as s...

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  17. A spring mass system is held at rest with the spring relaxed at a heig...

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