Email
Chat with tutors
logo

Ask Questions, Get Answers

X
 
Questions  >>  Archives  >>  JEEMAIN-2016
Answer
Comment
Share
Q)

A person trying to lose weight by burning fat lifts a mass of $10\; kg$ upto a height of $1\; m\; 1000\;times$.Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up? Fat supplies $3.8 \times 10^7\;J$ of energy per kg which is converted to mechanical energy with a $20\%$ efficiency rate. Take $g = 9.8 ms^{-2}$:

$\begin{array}{1 1} (1)2.45 \times 10^{-3}\;kg \\ (2)6.45 \times 10^{-3}\;kg \\ (3)9.89 \times 10^{-3}\;kg \\ (4)12.89 \times 10^{-3}\;kg \end{array} $

1 Answer

Home Ask Tuition Questions
Your payment for is successful.
Continue
...