COMEDK · Physics · 6. Work Power Energy
If reaction is \(\mathrm{R}\) and coefficient of friction is \(\mu\), what is work done against friction in moving a body by distance \(\mathrm{d}\) ?
- A \(2 \mu \mathrm{Rd}\)
- B \((\mu \mathrm{Rd}) / 4\)
- C \(\mu \mathrm{Rd}\)
- D \((\mu \mathrm{Rd}) / 2\)
Answer & Solution
Correct Answer
(C) \(\mu \mathrm{Rd}\)
Step-by-step Solution
Detailed explanation
The force of kinetic friction \(f_k\) acting on a body is given by the product of the coefficient of kinetic friction \(\mu\) and the normal reaction force \(R\). \(f_k = \mu R\) The work done \(W\) against friction when moving a body by a distance \(d\) is defined as the…
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