A 156-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 29.1° below the horizontal. The coefficient of kinetic friction is 0.244. What should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero?

Chapter 07, Problem 024 Go In the figure, a horizontal force F, of magnitude 20.0 N is applied to a 3.17 kg book as the book slides a distanced = 0.93 m up a frictionless ramp at angle e = 30°. (a) During the displacement, what is the net work done on the book by Fa, the gravitational force on the book, and the normal force on the book? (b) If the book has zero kinetic energy at the start of the displacement, what is its speed at the end of the displacement? (a) Number Units (b) Number Units Click if you would like to Show Work for this question: Open Show Work Question Attempts: Unlimited SAVE FOR LATER SUBMIT ANSWER co search 6:56 PM ENG 3/30/2021 ASUS 13) t6 f9 home F10end pouse break fmpgup prt sc delete insert % 3 7. 8. 9. bocksp 10

A 45.9-kg box is being pushed a distance of 6.54 m across the floor by a force P whose magnitude is 168 N. The force P is parallel to the displacement of the box. The coefficient of kinetic friction is 0.208. Determine the work done on the box by (a) the applied force, (b) the friction force, (c) the normal force, and (d) by the force of gravity. Be sure to include the proper plus or minus sign for the work done by each force.

The figure shows three forces applied to a trunk that moves leftward by 3.01 mover a frictionless floor. The force magnitudes are F1- 4.50 N, F2 - 9.48 N, and F3- 2.85 N, and the indicated angle is e- 60°. (a) During the displacement, what is the net work done on the trunk by the three applied forces, the gravitational force, and the normal force? (b) Is there a net transfer of energy to or from the trunk? (c) Does the kinetic energy of the trunk increase or decrease? (a) Number i Units (b) (c)