An crate is dragged across a level floor at a constant speed of by a rope that makes…

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

18\,\text{kg}

crate is dragged across a level floor at a constant speed of

2.5\,\text{m\,s}^{-1}

by a rope that makes a

30^{\circ}

angle above the horizontal. The coefficient of kinetic friction between the crate and the floor is

0.28

. Determine the mechanical power that must be supplied through the rope to maintain the motion.