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In case of a moving body as force of fri...

In case of a moving body as force of friction is `mumg`, can we regard `mumgx` as potential energy similar to `mgh`?

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No, PE can be defined only for conservative forces.
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Which of the following forces can cause a change in the potential energy?

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A particle of mass m moves in a force field such that its potential energy in force field is defined by the equation U = +A (x-a)^(2) (x-b)^(2) . Where A, a and b are +ve constants then body may oscillate simple harmonically about point.

Can you associate potential energy with a non conservative force ?

Assertion: Work done by the force of friction in moving a body around a closed loop is zero. Reason: Work done does not depend upon the nature of force.

Underline the correct alterntaive: a) when a conservative force does positivie work on a body, the potential energy of the body increase/decreases/remains unaltered. work done by a body against friction always results in a loss of its kinetic /potential energy. c) The rate of change of total momentum of a many-particle system is proportional to the external force/ sum of the internal forces on the system. d) In an inelastic collision of two bodies, the quantities which do not change after the collision are the total kinetic energy/total linear momentum/total enregy of the system of two bodies.

CENGAGE PHYSICS ENGLISH-WORK, POWER & ENERGY-Exercise 8.3
  1. A rock of mass m is dropped to the ground from a height h. A second ro...

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  2. Three identical balls are thrown from the top of a building, all with ...

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  3. A lorry and a car moving with the same kinetic energy are brought to r...

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  4. In case of a moving body as force of friction is mumg, can we regard m...

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  5. A particle of mass m=5.00kg is released from point A and it slides on ...

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  6. Two objects are connected by a light string passing over a light, fric...

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  7. At time t, the kinetic energy of a particle is 30.0J and the potentia...

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  8. Under the action of a force, a 2 kg body moves such that its position ...

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  9. A uniform rod of mass M and length L is held vertically upright on a h...

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  10. A uniform chain is just at rest over a rough horizontal table with its...

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  11. In the figure, a block slides along a track from one level to a higher...

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  12. Two smooth balls of mass m1 and m2 connected by a light inextensible s...

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  13. In figure, an inextensible string that connects two bodies of mass M a...

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  14. A block slides down a curved frictionless track and then up an incline...

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  15. A child's pogo stick(figure) stores energy in a spring with a force co...

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  16. A block of mass m is released from point (A) in figure. The track is f...

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  17. In figure, the stiffness of the spring is k and mass of the block is m...

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  18. A child slides without friction from a height h along a curved water s...

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  19. A spring-mass system ( m1 + massless spring + m2) fall freely from a h...

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  20. A ring of mass m=10kg can slide through a vertical rod with friction. ...

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