1.

If a 10 kg body falls to the ground from a height of 15 m and if all its mechanical energy is convetred into heat the heat produced will be : (5 = 4.2 J/cal)

Answer»

6 cal
60 cal
150 cal
350 cal

Solution :HEAT PRODUCED, `Q=W/J=(MGH)/(J)=(10xx9.8xx15)/(4.2)`
Q = 350 CALORIES.


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