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A block f mas 1 kg is placed at the poin...

A block f mas 1 kg is placed at the point A of a rough track shown in figure. If slightly pushed towards right, it stos at the point B of the track. Calculate the work done by the frictional force on the block during its transit from A to B.

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The correct Answer is:
B
Given , `m=1kg, H=1m, h=0.8m`
Here work done by friction
`=change in P.E.
`rarr W_1=mgh-mgH `
`=1xx10xx(0.2)=-2J`
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HC VERMA-WORK AND ENERGY-Exercises
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  2. A uniform chain of length L and mass M overhangs a horizontal table wi...

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  4. A block of mass 5.0 kg is suspended from the end of a vertical spring ...

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  5. A block of mass 250g is kept on a vertical spring of spring constant 1...

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  6. Figure shows a spring fixed at the bottom end of an incline of inclina...

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  7. A block of mass m moving at a speed 'v' compresses a spring through a ...

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  8. Consider the situation shown in figure. Initially the spring is unstre...

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  9. A block of mass m is attached to two unstretched springs of spring con...

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  10. A block of mass m sliding n a smooth horizontal surface with velocity...

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  11. A small block of mass 100 g is pressed against a horizontal spring fix...

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  12. A small hevy block is attached to the lower4 end of a light rod of len...

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  13. Figure shows two block A and B, each having a mass of 320 g connected ...

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  14. one end of a spring of natural length h and spring constant k is fixed...

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  15. Figure shows a light rod of length l rigidly attached to a small heavy...

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  16. The bob of a pendulum at rest is given a sharp hit to impart a horizon...

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  17. A simple pendulum consists of a 50 cm long string connected to a 100 g...

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  18. Figure shows a smooth track, a part of which is a circle of radius R. ...

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