A box of mass 25 kg is being pulled across a horizontal surface at a constant speed…

PHYSICS · Subjective · CBSE · Physics · Laws of Motion · Laws of Motion

Problem

A box of mass 25 kg is being pulled across a horizontal surface at a constant speed by a rope at an angle of

40^\circ

to the horizontal. The tension in the rope is 150 N. Determine the coefficient of dynamic friction,

\mu_d

, between the box and the horizontal surface. (

g = 9.81 \text{ Nkg}^{-1}

)