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In a factory it is desired to lift 2000 ...

In a factory it is desired to lift 2000 kg of metal through a distance of 12 m in 1 minute. Find the minimum horsepower of the engine to be used.

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The correct Answer is:
C
`m=2000kg, S=12m, t=1min=60sec
So, work `=W=f costheta=mgscos0^0`
`[0=theta^0,minimum work]`
`2000xx10xx12`
`240000j`
So, Power `=p=W/t`
`24000/6=4000watt`
`h.p=4000/746=5.3hp`
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  10. A car weighing 1400 kg is moving at speed of 54 km/h up a hill when t...

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  11. small block of mass 200 g is kept at the top of a frictionless incline...

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  12. In a children's park, there si a slide which has a total length of 10 ...

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  13. Figure shows a particle slideing on a frictionles track which terminat...

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  14. A block weighing 10 N tavels down a smooth curved track AB joined to a...

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  15. A uniform chain of mass m and length l overhangs a table with its two ...

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  17. A block f mas 1 kg is placed at the point A of a rough track shown in ...

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  18. A block of mass 5.0 kg is suspended from the end of a vertical spring ...

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  20. Figure shows a spring fixed at the bottom end of an incline of inclina...

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