A block of weight w sits on a frictionless inclined plane, which makes an angle

Question

A block of weight w sits on a frictionless inclined plane, which makes an angle ? with respect to the horizontal, as shown. A force of magnitude F, applied parallel to the incline, pulls the block up the plane at constant speed. The block moves a distance L up the incline. The block does not stop after moving this distance but continues to move with constant speed. What is the total work Wtot done on the block by all forces? (Include only the work done after the block has started moving, not the work needed to start the block moving from rest.) What is Wg, the work done on the block by the force of gravity as the block moves a distance L up the incline? Express the work done by gravity in terms of the weight w and any other quantities given in the problem introduction. A block of weight w sits on a frictionless inclined plane, which makes an angle ? with respect to the horizontal, as shown. A force of magnitude F, applied parallel to the incline, pulls the block up the plane at constant speed. The block moves a distance L up the incline. The block does not stop after moving this distance but continues to move with constant speed. What is the total work Wtot done on the block by all forces? (Include only the work done after the block has started moving, not the work needed to start the block moving from rest.) What is Wg, the work done on the block by the force of gravity as the block moves a distance L up the incline? Express the work done by gravity in terms of the weight w and any other quantities given in the problem introduction. The block moves a distance L up the incline. The block does not stop after moving this distance but continues to move with constant speed. What is the total work Wtot done on the block by all forces? (Include only the work done after the block has started moving, not the work needed to start the block moving from rest.) What is Wg, the work done on the block by the force of gravity as the block moves a distance L up the incline? Express the work done by gravity in terms of the weight w and any other quantities given in the problem introduction. What is Wg, the work done on the block by the force of gravity as the block moves a distance L up the incline? Express the work done by gravity in terms of the weight w and any other quantities given in the problem introduction.

Explanation / Answer

for part B the answer is -WLsintheta

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