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Find the work a boy of weight 55 kg has ...

Find the work a boy of weight 55 kg has to do against gravity when climbing from the bottom to the top of a 3.0 m high tree.

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[1650 J]
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PHYSICS GALAXY - ASHISH ARORA-WORK, ENERGY AND POWER-Practice Exercise
  1. A factory worker pushes a 25.0 kg crate downward at an angle of 30^(@)...

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  2. Find the work a boy of weight 55 kg has to do against gravity when cli...

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  3. A force of 20.0 N is required to hold a spring stretched by 5.0 cm fro...

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  4. A spring requires 46 J of work to extend it 12 cm and 270 J of work to...

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  5. A force is given by F=kx^(2) where x is in meters and k=10 N//m^(2) Wh...

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  6. A block shown in figure -3.12 slides on a semicircular frictionless tr...

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  7. A stone is dropped by an astronaut from a height of 1.47 m above the s...

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  8. A brick is placed on a vertical compressed massless spring of force co...

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  9. In figure-3.13, a block slides along a track from one level to a highe...

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  10. A particle slides along a track with elevated ends and a flat central ...

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  11. A 80 kg person expends 400 W when walking on a horizontal tracker belt...

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  12. A bus of mass 1000 kg has an engine which produces a constant power of...

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  13. An automobile engine develops 30 hp in moving the automobile at a cons...

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  14. The force needed to pull the tape through an audio cassette player is ...

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  15. The power P delivered by a windmill whose blades sweep in a circle of ...

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  16. A train of mass 10^(6) kg is going up an incline plane with incline 1 ...

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  17. A car is moving with speed 30m//sec on a circular path of radius 500 m...

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  18. A solid body starts rotating about a stationary axis with an angular a...

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  19. A solid body rotates with deceleration about a stationary axis with an...

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  20. A solid body starts rotating about a stationary axis with an angular a...

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