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CBSE Class 9 Answered

An engine draws water from depth of 10m with constant speed 2m/s at the rate of10kg per10 second(outlet). The Power of engine is (watt.)(take 9.8m/s^2) 1)102 2)50 3)100 4)200
Asked by | 22 Feb, 2012, 01:26: PM
answered-by-expert Expert Answer

work done = mgh

= 10 X 9.8 X 10 = 980

power= work done/time taken

time in drawing water

= distance/speed = 10/2 =5sec

power = 980/5 = 196w

Answered by | 22 Feb, 2012, 07:20: PM

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