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Grade: 10

                        

A body of mass 2kg moves 30m aginst a frictional force of 100N. If the work is completely converted into heat, the amount of heat expressed in joules will be?

9 years ago

Answers : (2)

AKASH GOYAL AskiitiansExpert-IITD
419 Points
							

Dear Vishnu

The work done against friction will be  converted into heat

Work done against friction=100 x 30 = 3000 J

Heat=3000 J Answer

 

All the best.                                                           

AKASH GOYAL

AskiitiansExpert-IIT Delhi

 

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9 years ago
vikas askiitian expert
509 Points
							

force =100N

workdone by friction = f.s = force*displacement

                             =100*30 =3*103 J

this is the energy which is converted to heat ...

9 years ago
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