A crate of mass 15 kg is pulled up a rough slope inclined at 30∘ 30^\circ\,30∘ to the horizontal by a rope parallel to the slope. The tension in the rope is T T\,T newtons, as shown in the diagram.
The coefficient of friction between the crate and the slope is 0.25.
Given that the crate moves up the slope at a constant velocity, calculate the value of T T\,T to 3 significant figures. (Take g=9.8 m s−2g = 9.8\text{ m s}^{-2}g=9.8 m s−2)
41.7 N41.7\text{ N}41.7 N
73.5 N73.5\text{ N}73.5 N
105 N105\text{ N}105 N
146 N146\text{ N}146 N