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ICSE Class 10 Answered

ex. 2a q 16
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Asked by nilesh.dhote74 | 30 Apr, 2020, 04:59: PM
answered-by-expert Expert Answer

a)

(i) Work done is same for both as both the people carry the same weight of water to the same height.

 

(ii) Power developed is

L e t space p o w e r space d e v e l o p e d space b y space f a t h e r space b e space P subscript f space a n d space t h a t space b y space a space b o y space b e space P subscript b P subscript b over P subscript f equals fraction numerator begin display style bevelled W over t subscript b o y end subscript end style over denominator begin display style bevelled W over t subscript f a t h e r end subscript end style end fraction equals t subscript f a t h e r end subscript over t subscript b o y end subscript P subscript b over P subscript f equals 2 over 3 P subscript b colon space P subscript f space equals 2 colon 3 b right parenthesis space M a s s space o f space w a t e r space l i f t e d space b y space b o t h space i s comma space m subscript w space equals space rho cross times V space equals space 10 cubed space cross times open parentheses 20 close parentheses cross times 10 to the power of negative 3 end exponent space equals space 20 space k g space H e n c e comma space w o r k space d o n e space i s comma space W space equals space m subscript w g h space equals space 20 cross times 9.8 cross times space 20 W space equals 3920 space J space equals space 3.92 space k J

Answered by Shiwani Sawant | 30 Apr, 2020, 06:06: PM

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ex. 2a q 16
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Asked by nilesh.dhote74 | 30 Apr, 2020, 04:59: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
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