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ICSE Class 10 Answered

ch. work
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Asked by nilesh.dhote74 | 27 Apr, 2020, 05:57: PM
answered-by-expert Expert Answer

Volume of water= 50 L=50 x10-3 m3

Density of water= 1000kgm-3

Mass of water= Volume of water x density of water

= 50 x10-3 x1000= 50kg 

Work done in raising 50kg water to a height of 25m against the force of gravity is:

W = mg x h= mgh

P o w e r space equals space fraction numerator w o r k space d o n e over denominator t i m e space t a k e n end fraction space equals space fraction numerator m g h over denominator t end fraction space equals space fraction numerator 50 cross times 10 cross times 25 over denominator 5 end fraction space equals space 2500 space W space equals space 2.5 space k W
Answered by Shiwani Sawant | 27 Apr, 2020, 07:12: PM

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