Answer the following with reference to the physical quantity power:
PHYSICS · Subjective · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
Answer the following with reference to the physical quantity power:
(i) Distinguish between average power and instantaneous power. Write the mathematical expression for each.
(ii) State any two assumptions that are implicitly made while deriving the relation P=Fv for a moving body.
(iii) Explain briefly why the relation P=Fv cannot be directly applied to a deformable body whose mass changes with time.