Problem: A box with mass 5.00 kg is pulled up a 36.9° incline by a constant force  F that has magnitude 75.0 N and that is parallel to the incline. The distance along the incline from the bottom to the top is 6.00 m. During the motion of the box, the surface of the incline exerts a constant friction force fk = 18.0 N on the box, in a direction opposite to the motion.For the motion from the bottom of the incline to the top, how much work is done by each of the following forces? In addition to giving the magnitude of the work, be sure to indicate whether the work done is positive or negative.(i) the force F that pulls the box(ii) the friction force fk(iii) the gravity force (iv) the normal force

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Problem Details

A box with mass 5.00 kg is pulled up a 36.9° incline by a constant force  that has magnitude 75.0 N and that is parallel to the incline. The distance along the incline from the bottom to the top is 6.00 m. During the motion of the box, the surface of the incline exerts a constant friction force fk = 18.0 N on the box, in a direction opposite to the motion.

For the motion from the bottom of the incline to the top, how much work is done by each of the following forces? In addition to giving the magnitude of the work, be sure to indicate whether the work done is positive or negative.

(i) the force F that pulls the box


(ii) the friction force fk


(iii) the gravity force 


(iv) the normal force


Solution Details

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Work On Inclined Planes concept. You can view video lessons to learn Work On Inclined Planes Or if you need more Work On Inclined Planes practice, you can also practice Work On Inclined Planes practice problems .

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Perry's class at TAMU.