(Please refer to the attachment for figs)
1. Tension in the rope can be resolved into components Tcos(theta); horizontal and Tsin(theta); vertical. Vertical component does zero work as there is no vertical displacement. Horizontal component does work given by : W = Tcos(theta) x Displacement
Substituting values we get : 247 = 40cos(theta) x 7 or cos(theta) = 0.882 or theta = 28 degrees
2. Work done by the applied force = Applied force x Displacement = 7.6 x 15 = +114 J
3. Components of the applied force in the direction of displacement = 25cos37 = 19.97 N
Work done by the applied force = Components of the applied force in the direction of displacement x Displacement = 19.97 x 15 = 300 J
4. As the applied force and displacement are in opposite directions, work done by the applied force is negative.
Component of the applied force in the direction of displacement ...
Step by step solutions provided.