Question

A body of mass 5 kg falls from a height of 30 metre if its all mechanical energy is changed into heat than heat produced will have ​

Answer 1

Potential energy at height 30m = mgh = 5×10×30=1500J

Total mechanical energy= heat energy =1500J

Answer 2

HEY MATE HERE IS YOUR ANS

We know,

1 cal = 4.2 J

g=9.8 m/s^2

Again,

E=mgh

=5*9.8*30

=1470 J

=1470/4.2 cal

=350 cal

So, answer a) 350 cal

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