A 2.0 kg stone slides from rest down a hill 5.0 m high and is observed to be moving at 6.0 m/s at the bottom. During this process, how much thermal energy have been produced due to the friction?
Given,
Mass of the stone ,m=2 kg
Height ,h=5 m
And Velocity ,v =6 m/s
Where gravitational acceleration ,
Potential energy ,
Since stone moves down from rest ,so gravitational potential energy will converted to thermal kinetic energy.
Kinetic energy ,
So Thermal energy will be produced is
Thermal energy
=98-36
=62 J
Answer : 62 J Thermal energy have been produced due to friction.
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