please show steps :) 21. A block of mass m slides down a rough ramp of...

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21. A block of mass m slides down a rough ramp of height h. Its initial speed is zero. Its final speed at the bottom of the r

please show steps :)

science physics

Answer 1

Answer #1

Solution : when block was kept at height h it was having only potential energy = mgh .......(1)

Now when it is on the ground the kinetic energy = 0.5mV² ........(2)

Total change in energy = heat emitted

So heat released = final energy - initial energy

So heat = 0.5 mv2 - mgh

Answer 2

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