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A body of mass 2 kg is being dragged wit...

A body of mass 2 kg is being dragged with uniform velocity of 2 m / s on a rough horizontal plane. The coefficient of friction between the body and the surface is 0.20. The amount of heat generated in 5 sec is
. `(4.2"joule"//cal and g=9.8 m//s^(2))`

A

9.33 cal

B

8.33 cal

C

7.33 cal

D

6.33 cal

Text Solution

Verified by Experts

The correct Answer is:
A
`F=0.2XX20=4n`
displacement `-2xx5=10m`
`WD=4xx10=40J=(40)/(4.2)=9.33` cal.
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ALLEN-NEWTONS LAWS OF MOTION-EXERCISE-I
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