COMEDK 2023 Shift 1 Paper

The work done against friction when moving a body by a distance d is given by the formula:
W=Ff⋅d
where W is the work done against friction, Ff is the force of friction, and d is the distance moved.
The force of friction Ff can be calculated as:
Ff=µ⋅R
where µ is the coefficient of friction and R is the normal reaction force exerted by the surface on the body.
Substituting the expression for Ff into the work formula gives:
‌W=(µ⋅R)⋅d
‌W=µRd
Therefore, the correct answer is:
Option A: µ‌Rd.