Why does Part D not include the effects of the force of the gravity in the total

Question

Why does Part D not include the effects of the force of the gravity in the total work?

Practice Now the applied force is changed to F2, so that instead of puting the block up the incline, the force pulls the block down the incline at a constant speed as shown in Figure 2) Constants A block of weight mg sits on an inclined plane as shown in (Figure 1) A force of magnitude Fi is applied to pull the block up the incline at conslant speed The coefficient of kinetic friction between the plane and the block PartC Whiet is the total work Wink done on the block by the force of friction as the block moves a distance L down the incline? Express your answer in terms of any or all of the variables , m, g. L and F2 igure 1of 2> Part D What is the total work W done on the box by the appled force in this case? Express your answer in terms of any or all of the vanables-m, g,eL, and F. Correct

Explanation / Answer

here Wf2 is the total work done on the box and as you know workdone is equal to force*displacement.

When we calculate force, we take into reference all the forces that act on the box including gravity that is mg.

Hence, the effects of gravity is not excluded from total work done it's just when we were calculating force acting on the box we considered that.

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