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How much work is done by the gravitation...

How much work is done by the gravitational force of earth acting on a satelite moving around it in a circular path ? Give reason for your answer.

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The correct Answer is:
Zero ; Because the gravitational force acts along the radius of circular path, at right angles (`90^(@)`) to the motion of satellite
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LAKHMIR SINGH & MANJIT KAUR-WORK AND ENERGY-Exercise
  1. What should be the angle between the direction of motion of a body so ...

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  2. In which of the following case of work done by a force will be maximum...

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  3. How much work is done by the gravitational force of earth acting on a ...

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  4. A man is instructed to carry a package from the base camp at B to summ...

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  5. When a ball is thrown vertically upwards, its velocity goes on decreas...

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  6. A man X goes to the top of a building by a vertical spiral staircase....

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  7. When a ball is thrown inside a moving bus, does its kinetic energy dep...

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  8. A bullet of mass 15 g has a speed of 400 m/s. What is its kinetic ener...

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  9. COMMERCIAL UNIT OF ENERGY

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  10. One kilowatt-hour is equal to :

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  11. Name two units of power bigger than watt.

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  12. Define the term 'watt'.

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  13. One horse power is equal to

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  14. Name the physical quantity whose unit is watt.

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  15. What is the power of a body which is doing work at the rate of one jou...

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  16. A body does 1200 joules of work in 2 minutes. Calculate its power.

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  17. How many joules are there in one kilowatt-hour?

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  18. Name the quantity whose unit is : (a) kilowatt (b) kilowatt-hour

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  19. What is the common name of '1 kWh' of electrical energy?

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  20. A cell converts one form of energy into another form. Name the two for...

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