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Problem 9: The person in the diagram pushes a lawn mower a distance d, applying a constant force of magnitude F that makes an angle 0 with the displacement, which is horizontal. A constant frictional force of magnitude f acts opposite in direction to the displacement. The only other forces on the lawn mower are gravity and the normal force. Part (a) Which of the forces do zero work on the lawn mower? Check all that apply. MultipleSelect : The applied force 2) 3) Gravity 4) 1) The normal force Friction Part (b) Write an expression for the work Wp done by the applied force in terms of F, d, and 0. Expression : WF = Select from the variables below to write your expression. Note that all variables may not be required. cos(a), cos(4), cos(0), sin(a.), sin(O), sin(0), ß, y, 0, d, f, F, g, m, n Part (c) Write an expression for the work W; done by the frictional force in terms of f and d. Expression : Wf = Select from the variables below to write your expression. Note that all variables may not be required. cos(0), sin(0), ß, y, 0, d, f, F, g, h, j, k, m, n, P

Problem 9: The person in the diagram pushes a lawn mower a distance d, applying a constant force of magnitude F that makes an angle 0 with the displacement, which is horizontal. A constant frictional force of magnitude f acts opposite in direction to the displacement. The only other forces on the lawn mower are gravity and the normal force. Part (a) Which of the forces do zero work on the lawn mower? Check all that apply. MultipleSelect : The applied force 2) 3) Gravity 4) 1) The normal force Friction Part (b) Write an expression for the work Wp done by the applied force in terms of F, d, and 0. Expression : WF = Select from the variables below to write your expression. Note that all variables may not be required. cos(a), cos(4), cos(0), sin(a.), sin(O), sin(0), ß, y, 0, d, f, F, g, m, n Part (c) Write an expression for the work W; done by the frictional force in terms of f and d. Expression : Wf = Select from the variables below to write your expression. Note that all variables may not be required. cos(0), sin(0), ß, y, 0, d, f, F, g, h, j, k, m, n, P

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Please answer Question 9 parts a-c

Problem 9: The person in the diagram pushes a lawn mower a distance d, applying a constant force of magnitude F that makes an angle 0 with the displacement, which is horizontal. A constant frictional force of magnitude f acts opposite in direction to the displacement. The only other forces on the lawn mower are gravity and the normal force. Part (a) Which of the forces do zero work on the lawn mower? Check all that apply. MultipleSelect : The applied force 2) 3) Gravity Friction 1) The normal force 4) Part (b) Write an expression for the work WF done by the applied force in terms of F, d, and 0. Expression : WF = Select from the variables below to write your expression. Note that all variables may not be required. cos(a.), cos(o), cos(0), sin(a), sin(), sin(0), B, Y, 0, d, f, F, g, m, n Part (c) Write an expression for the work Wr done by the frictional force in terms of f and d. Expression : Wf = Select from the variables below to write your expression. Note that all variables may not be required. cos(0), sin(0), ß, y, 0, d, f, F, g, h, j, k, m, n, P Part (d) Under what condition will the kinetic energy of the lawn mower increase? MultipleChoice : 1) Wp + Wf < 0 2) WF + Wf>0 3) WF + Wf = 0
Transcribed Image Text:Problem 9: The person in the diagram pushes a lawn mower a distance d, applying a constant force of magnitude F that makes an angle 0 with the displacement, which is horizontal. A constant frictional force of magnitude f acts opposite in direction to the displacement. The only other forces on the lawn mower are gravity and the normal force. Part (a) Which of the forces do zero work on the lawn mower? Check all that apply. MultipleSelect : The applied force 2) 3) Gravity Friction 1) The normal force 4) Part (b) Write an expression for the work WF done by the applied force in terms of F, d, and 0. Expression : WF = Select from the variables below to write your expression. Note that all variables may not be required. cos(a.), cos(o), cos(0), sin(a), sin(), sin(0), B, Y, 0, d, f, F, g, m, n Part (c) Write an expression for the work Wr done by the frictional force in terms of f and d. Expression : Wf = Select from the variables below to write your expression. Note that all variables may not be required. cos(0), sin(0), ß, y, 0, d, f, F, g, h, j, k, m, n, P Part (d) Under what condition will the kinetic energy of the lawn mower increase? MultipleChoice : 1) Wp + Wf < 0 2) WF + Wf>0 3) WF + Wf = 0
Expert Solution
Step 1: Given Data

Given:displacement is d in +x directionexternal force F at an angle θ below the +x axisconstant frictional force, f

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