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A woman pushes a trunk on a railway plat...

A woman pushes a trunk on a railway platform which has a rough surface. She applies a force of 100N over a distance of 10m. Thereafter, she gets progressively tired and her applied force reduces linearly with distance to 50N. The total distance through which trunk has been moved is 20m. Plot the force applied by the woman and the frictional force, which is 50N against the distance. Calculat the work done by the two forces over 20m.

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SL ARORA-Work, Energy and power-EXERCISE
  1. A woman pushes a trunk on a railway platform which has a rough surface...

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  2. What is the work done is crrrying a suitcase wighting 10 kg f on his h...

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  3. What is the work done is crrrying a suitcase wighting 10 kg f on his h...

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  4. Calculate the amount of work done by a labourer who carries n bricks, ...

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  5. A man moves on a straight horizontal road with a block of mass 2 kg i...

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  6. A force F = (2hati-6 hatj) N is applied on a body. which is sliding ov...

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  7. A force vecF=hat i+5 hat j+7 hat k acts on a particle and displaces it...

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  8. A particle is acted upon by constant forces vecF=-2hati+3hatj+4hatk an...

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  9. A man weighing 50kg f supports a body of 25 kg f on his head. What is ...

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  10. Explain how work done by a variable force may be measured.

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  11. A force F=(15+0.50x) acts on a particle in the X-directation ,where F ...

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  12. A force F=a+b x acts on a particle in the X-direction, where a and b a...

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  13. The relation between the displacement x and the time t for a body of m...

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  14. Figrue shows the F-x graph. Where F is the force applied x is the dist...

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  15. Calculate work done in moving the object from x=2 to x=3m from the gr...

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  16. The momentum of a body of masss of 5kg is 500kg ms^(-1). Find the its...

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  17. A bullet of mass 20g is found is found to pass two points 30cm apart i...

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  18. A body of mass 2kg is resting on rough horizontal surface. A force 20N...

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  19. A body of mass 2kg is resting on a rough horizontal surface. A force o...

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  20. A electron and a proton are detected in a cosmic ray experiment, the e...

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  21. A neutron of mass 1.66xx10^(-27)kg is moving with a speed of 7xx10^(5)...

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