A body is acted upon by force which is inversely proportional to the distance covered. The work done will be proportional to:

a) s

b) s2

c) √s

d) none of the above

Answer: d) none of the above


F ∝ (1/s)

⇒ F = k/s

\(\begin{array}{l}W = \int_{s_{1}}^{s}F.ds\end{array} \)

\(\begin{array}{l}W = \int_{s_{1}}^{s}\frac{k}{s}.ds\end{array} \)

= kIn(s/s1)

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