While working on the same topic

PHYSICS · Subjective · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

While working on the same topic, another student wrote the following on the board: “Power P=W×tP = W \times t. Since W=FsW = F s, therefore P=FstP = F s t and finally P=F(st)P = F (s t).” (i) Identify the first step in the above working that is incorrect and explain the error. (ii) Present the correct sequence of steps to obtain the relation between power, force and velocity for motion under a constant force.

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