 
			 
			MCQOPTIONS
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				| 1. | A body of mass 5 kg falls from a height of 30 metre. If its all mechanical energy is changed into heat, then heat produced will be [CPMT 1975] | 
| A. | 350 cal | 
| B. | 150 cal | 
| C. | Radiation | 
| D. | 6 cal | 
| Answer» B. 150 cal | |