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Calculate the work done in lifting a 300...

Calculate the work done in lifting a 300 N weight to a height of 10 m with an acceleration `0.5 ms^(-2)`. Take `g=10ms^(-2)`

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SL ARORA-Work, Energy and power-EXERCISE
  1. A ball is throuwn vertially up with a velcity of 20ms^(-1). At height ...

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  2. 230 joules were spent in lifing a 10 kg weight to a height of 2 m. Cal...

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  3. Calculate the work done in lifting a 300 N weight to a height of 10 m ...

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  4. A bullet of mass 10 g travels horizontally with speed of 100 ms^(-1) a...

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  5. A simple pendulum of length 1m has a wooden bob of mass 1kg. It is str...

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  6. A spring gun has a spring constant of 80Ncm^(-1). The spring is compr...

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  7. A solid of mass 2 kg moving with a velocity of 10ms^(-1) strikes an id...

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  8. A 16kg block moving on a frictionless horiozntal surface with a veloci...

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  9. A block of mass 2kg is propped from a heught of 40cm on a spring where...

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  10. A block of massm, initally at rest is dropped from a height h onto a s...

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  11. An object is attached to a vertical springs and lowered slowly to its ...

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  12. A massless platform is kept on a light elastic spring as shown in figu...

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  13. About 4xx10^(9)kg of matter is converted into energy in the sun each s...

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  14. Show that energy equivalent to atomic mass unit equals nearly 933 MeV ...

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  15. 500 kg of water is heated from 20^(@) to 100^(@) C . Calculate the inc...

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  16. 1 mg of uranium is completely destroyed in an atomic bomb. How much en...

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  17. An electron - positron pair annihilates at rest to produce gamma-rays....

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  18. if 10 g of mass is completely converted into energy, then find the cor...

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  19. A lift is designed to carry a load of 4000kg through 10 floors of a bu...

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  20. A machine can take out 1000 kg of mud hour from a dept of 100 m . If ...

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