Question

A block of weight w sits on a plane inclined at an angle θ as shown. (Figure 1) The coefficient of kinetic friction between the plane and the block is μ.

A force F⃗ F→F_vec is applied to push the block up the incline at constant speed.

Part D

What is the change in potential energy of the block, ΔUΔUDeltaU, as it moves a distance LLL down the incline?

Express your answer in terms of some or all of the following: μμmu, www, θθtheta, LLL.

Part E

What is the work WWW done by the applied force of magnitude FFF?

Express your answer in terms of some or all of the following: μμmu, www, θθtheta, LLL.

Part F

What is the work WfWfW_f done on the block by the frictional force?

Express your answer in terms of some or all of the following: μμmu, www, θθtheta, LLL.
A force F is applied to push the block up the incline at constant speed. Part A What is the work We done on the block by the force of friction as the block moves a distance L up the incline? Express your answer in terms of some or all of the following: H, w, 6, L. View Available Hint(s) WW_f= -uwLcos (0) Submit Previous Answers Correct Part B What is the work W done by the applied force of magnitude F? Express your answer in terms of some or all of the following: , w, 6, L. WW = (wsin (@) + uwcos (6) L Submit Previous Answers Correct Part C What is the change in the potential energy of the block, AU, after it has been pushed a distance L up the incline? Express your answer in terms of some or all of the following: H, w, 6, L. AUDelta = wsin (0) L

Hey, please answer part D E F

Answer 1

f) Since friction f = un ung caso acts to upwards and motion is downsards f. h work done = - ung was ou f. L = fh cost o x- angle between f & L