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Can there be a displacement of any objec...

Can there be a displacement of any object in the absence of any external force?

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A force of 7 N acts on an object. The displacement is, say 8m in the direction of the force. Let us take it that the force acts on the object through the displacement. What is the work alone in this case?

A force of 7 N acts on an object. The displacement is, say 8 m in the direction of the force. Let us take it that the force acts on the object through the displacement. What is the work done in this case ?

MBD-WORK, ENERGY AND POWER-Example
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  6. An electric heater is rated 1500 W. How much energy does it use in 10 ...

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  7. An object of mass 'm' is moving with velocity 'v'. How much work shoul...

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  8. Calculate the work required to be done to stop a car of 1500 kg moving...

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  9. What is kinetic energy ? Derive a mathematical expression for kinetic ...

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  10. What is law of conservation of mass?

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  11. If the force acting on the object is not in the direction of motion th...

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  12. What is work ? How can you calculate it ? Also give the unit of work.

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  13. Show by giving an example that if force acting in the body does not pr...

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  14. A stone tied to one end of string is moved in a circle. How much work ...

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  15. What is power ? Write its SI unit also.

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  16. Prove by an experiment that mechanical energy can be transformed into ...

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  17. Differentiate between Potential Energy and Kinetic Energy.

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  18. A horse and a dog are running with the same velocity- If the mass of h...

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  19. Two masses m and 2m are dropped from height h and 2h. On reaching the ...

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