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If a force vecF=5hati+5hatj+6hatk causes...

If a force `vecF=5hati+5hatj+6hatk` causes a displacement `vecs=3hati+6hatj+2hatk` work done is

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ERRORLESS -WORK , ENERGY , POWER AND COLLISION-Ordinary Thinking (Objective Questions) (Power)
  1. An electric motor creates a tension of 4500 newton in a hoisting cable...

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  2. A weight lifter lifts 300kg from the ground to a height of 2 meter in ...

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  3. If a force vecF=5hati+5hatj+6hatk causes a displacement vecs=3hati+6ha...

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  4. An engine develops 10 kW of power. How much time will it take to lift ...

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  5. A car of mass m is driven with acceleration a along a straight level r...

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  6. The average power required to lift a 100 kg mass through a height of 5...

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  7. From a waterfall, water is falling down at the rate of 100kg / s on th...

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  8. The power of pump, which can pump 200 kg of water to height of 200 m i...

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  9. A 10 H.P. motor pumps out water from a well of depth 20 m and fills a ...

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  10. A car of mass 1250 kg is moving at 30(m)//(s). Its engine delivers 30 ...

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  11. A force applied by an engine of a train of mass 2.05xx10^6kg changes i...

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  12. A truck of mass 30,000 kg moves up an inclined plane of slope 1 in 100...

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  13. A 60 kg man runs up a staircase in 12 seconds while 50 kg man runs up ...

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  14. A pump motor is used to deliver water at a certain rate from a given p...

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  15. What average horsepower is developed by an 80 kg man while climbing in...

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  16. A car of mass 1000 kg accelerates uniformly from rest to a velocity of...

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  17. A quarter horse power motor runs at a speed of 600 r . p . m . Assumin...

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  18. An engine pumps up 100 kg water through a height of 10 m in 5 s. If ef...

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  19. A force 2hati+3hatj+4hatk N acts on a body for 4 sec, produces a displ...

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  20. The power of pump, which can pump 200 kg of water to a height of 50 m ...

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