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A pendulum of mass 2kg is given an energy of 200J then the maximum height it will reach is _____(a) 25m(b) 20m(c) 15m(d) 10mThe question was posed to me in final exam.My question is from Kinetic Energy topic in chapter Work, Energy and Power of Physics – Class 11

Answer»

Correct answer is (d) 10m

The EXPLANATION is: Let the VALUE of g = 10ms^-2. At the HIGHEST point, the KINETIC energy gets converted in to potential energy so, 200 [kgm^2s^-2] = 2*10*h [kgms^-2]. This gives h = 10m.



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