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CBSE - X - Physics - Electricity

QUESTION
 
 
 

Asked by gpnkumar0 2nd October 2017, 10:53 AM
Answered by Expert

Answer:

begin mathsize 12px style It space is space given space that space plywood space is space 1 divided by 3 space immersed space in space water. space
Volume space of space plywood equals space straight V space and space density space of space plywood space equals straight d
Now comma space straight d space equals 1000 cross times left parenthesis 1 divided by 3 right parenthesis straight V cross times straight g equals dVg space......... space left parenthesis Equation space 1 right parenthesis
Density space of space water space equals space 1000 space kg divided by straight m cubed space and space straight g space equals space 10 space straight m divided by straight s squared
Substituting space the space values space in space equation space 1 space and space solving comma space we space get
straight d equals space 1000 space divided by space 3 space almost equal to space 333 space kg divided by straight m cubed
When space the space space man space of space mass space straight m space jumps space on space it space making space it space immersed space 2 divided by 3 space of space its space volume. space
Then space we space have comma space density space straight d apostrophe space as
straight d equals space 1000 cross times left parenthesis 2 divided by 3 right parenthesis straight V cross times straight g equals left parenthesis straight m plus 1000 straight V divided by 3 right parenthesis straight g space....... left parenthesis Equation space 2 right parenthesis
Here space straight V space is space given space as space colon space 3 cross times 2 cross times 0.05 space
ON space solving space equation space left parenthesis 2 right parenthesis space we space get space mass space of space man equals 100 space kg. space end style
Answered by Expert 3rd October 2017, 12:10 PM

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