Question

A block of mass M is pulled over a rough horizontal surface. The block has a coefficient of kinetic friction with the surface of u. The block is subject to the normal force, the friction force, the force of gravity, and a force from a rope of magnitude T which pulls up and to the right at an angle of 0 with the horizontal. If M 9.4kg, u=0.27, T-42N, and 0=38.6 degrees, what the work done by the rope on the block as the block is displaced a distance d 3.6m to the right? Answer The box was initially travelling to the right at speed v 1.7 in Joules.

Answer 1

Tsino Ni I V=1.7 mls, m = 9.4kg, M=0.27, T=42N, Q.-TCOSO - blible 0 = 38.6', d=3,6m mg cwork done by rope, w=Tcosord CU = 42cos 38.6'x3.6 [w= 118.17