A block returns to its initial position after dissipating mechanical energy in the from of heat through frictionn. Is this process reversibe or irreversible ?

A block returns to its initial position after dissipating mechanical e

1.	A block returns to its initial position after dissipating mechanical energy in the from of heat through frictionn. Is this process reversibe or irreversible ?
Answer» This process is irreversible because the same amount of mechanical energy cannot be regained from heat. It follows form the second law of thermodynamics which states that all the heat can never be converted to useful work.

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A block returns to its initial position after dissipating mechanical energy in the from of heat through frictionn. Is this process reversibe or irreversible ?

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