Class Management | 14.2 Conservation of Energy Begin Date: 11/8/2023 12:01:00 AM -- Due Date: 12/1/2023 11:59:00 PM End Date: 12/8/2023 11:59:00 PM (13%) Problem 6: A skateboarder with mass ms is standing at the top of a ramp which is a distance hy above the ground. The skateboarder then jumps on his skateboard and descends down the ramp. His speed at the bottom of the ramp is of . us eted eted D A 33% Part (a) Write an expression for the work, Wf, done by the friction force between the ramp and the skateboarder in terms of g and the variables given in eted the problem statement. Grade Summary eted WE = Deductions 0% Potential 100% Late Work % 70% eted cos(0) sin(0) 8 9 Late Potential 70% eted B 6 Submissions d g 3 Attempts remaining: 4 hy ms P + (1% per attempt) detailed view Vf NO BACK Submit Hint Feedback I give up! Hints: 1% deduction per hint. Hints remaining: 3 Feedback: 1% deduction per feedback. 33% Part (b) The ramp makes an angle 0 with the ground. Write an expression for the magnitude of the friction force, Ff, between the ramp and the skateboarder. 4 33% Part (c) When the skateboarder reaches the bottom of the ramp, he continues moving with the speed of = 6.7 onto a flat surface covered with grass. The friction between the grass and the skateboarder brings him to a complete stop after 5.00 m. Given that the mass of the skateboarder is ms = 49 kg, calculate the magnitude of the friction force, Fgrass in newtons, between the skateboarder and the grass. All content O 2023 Expert TA, LLC