FIGURE 7-2 Three applied forces, F 1 = 20.0 N, F 2 = 40.0 N, and F 3 = 10.0 N act on an object with a mass of 2.00 kg which can move along an inclined plane as shown in the figure. The questions refer to the instant when the object has moved 0.600 m along the surface of the inclined plane in the upward direction. Neglect friction and use g = 10.0 m/s 2 . -Refer to Fig. 7-2. What is the amount of work done by the force F₃ as the object moves up the inclined plane? A)12.0 J B)16.0 J C)20.8 J D)0 J E)24.0 J

Question

Quizplus · Accepted Answer

The work done by a force is calculated as the product of the force, the displacement, and the cosine of the angle between the force and the displacement. If the force F3 is perpendicular to the displacement (as it would be if it is normal to the inclined plane), the angle is 90 degrees, and the cosine of 90 degrees is 0, resulting in zero work done.

FIGURE 7-2 Three Applied Forces, F1 = 20

FIGURE 7-2 Three Applied Forces, F₁ = 20