A body having 7 kg of mass moves with a velocity of 20 m/s covers a vertical height of 8.75 m. What is the work done by the moving force in Joules? Take g = 10 m/s^2.(a) 0(b) 10(c) 15(d) 20This question was posed to me by my school principal while I was bunking the class.Asked question is from Work-Energy Theorem topic in division Work, Energy and Power of Physics – Class 11

A body having 7 kg of mass moves with a velocity of 20 m/s covers a ve

1.	A body having 7 kg of mass moves with a velocity of 20 m/s covers a vertical height of 8.75 m. What is the work done by the moving force in Joules? Take g = 10 m/s^2.(a) 0(b) 10(c) 15(d) 20This question was posed to me by my school principal while I was bunking the class.Asked question is from Work-Energy Theorem topic in division Work, Energy and Power of Physics – Class 11
Answer» RIGHT option is (a) 0 The best explanation: By work-energy THEOREM, the total work DONE on a body is equal to the change in the total energy. K.E. = \(\Big(\frac{1}{2}\Big)\)mv^2 and P.E. = MGH. One can find out the total change in the kinetic and potential ENERGIES at the initial and the final points, i.e. at the starting and after covering a distance of 8.75 m. The total change in the total energy is 0. Hence the work done is 0.

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