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ICSE Class 9 Answered

Sir/mam can you please help me with this numerical
 
A boy weighing 75 kg is wearing shoes with heel of area of cross section 20 cm square while a girl weighing 40kg Is wearing sandals of area of cross section 1.5 cm square . Compare the pressure exerted on the ground by their heels when they stand on the heel of one foot . ( do the conversion of units wherever necessary)
Asked by abhi611 | 13 Aug, 2017, 04:02: PM
answered-by-expert Expert Answer
begin mathsize 12px style Here space we space use space the space formula space colon space Pressure space equals Force over Area For space the space boy colon space Pressure space equals fraction numerator 75 space cross times space 9.8 over denominator 0.20 space cross times space 10 to the power of negative 4 end exponent end fraction space equals space 36.75 space cross times space 10 to the power of 6 space Pa space For space the space girl space with space heels colon space space Pressure space equals space fraction numerator 40 space cross times space 9.8 over denominator 0.015 space cross times 10 to the power of negative 4 end exponent end fraction space equals space 26.13 space cross times 10 to the power of 6 space Pa space space The space pressure space exerted space by space the space boy space is space nearly space ten space times space that space exerted space by space the space boy. end style
Answered by Yashvanti Jain | 14 Aug, 2017, 05:59: PM

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