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A coolie is walking on a railway platfor...

A coolie is walking on a railway platform with a load of 30 kg on his head. How much work is done by coolie?

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MODERN PUBLICATION-WORK AND ENERGY-EXERCISE
  1. A body is thrown vertically upwards. Its velocity goes on decreasing. ...

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  2. State the energy conversion in a dry cell.

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  3. A coolie is walking on a railway platform with a load of 30 kg on his ...

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  4. What is the work done by earth in moving around the sun?

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  5. When displacement is in a direction opposite to the direction of force...

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  6. Define 1kWh.

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  7. In an oscillating pendulum, at what positions are the potential and ki...

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  8. How many joules are present in 1 kilowatt hour?

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  9. Name the term used for the sum of kinetic and potential energy of a bo...

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  10. What type of energy conversion takes place in a thermal power plant?

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  11. If the heart works 60 joules in one minute. What is its power?

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  12. State the value of commercial unit of electrical energy in joule.

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  13. At what rate is electrical energy consumed in a 60 W bulb?

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  14. Give an example of a body having potential energy due to change in sha...

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  15. If the speed of the body is halved. What is the change in kinetic ener...

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  16. Under what conditions is work said to be done?

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  17. Write an expression for kinetic energy of an object. On what factors d...

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  18. Derive a relationship between kinetic energy and linear momentum.

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  19. Two bodies of mass m1 andm2(>m1) have equal linear momentum. Which bod...

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  20. Two bodies of mass m1 andm2(>m1) have equal kinetic energies. Which b...

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