Class Management | Help HW 9 - Mechanical Energy Begin Date: 3/19/2024 12:01:00 AM -- Due Date: 4/30/2024 11:59:00 PM End Date: 5/4/2024 11:59:00 PM (14%) Problem 6: In the three figures labeled A, B, and C at the right are shown three situations in which a % + KE >0 here bulldog on a skateboard traverses a dip in the ground. (The dips are all the same.) In A, the bulldog enters the dip R e traveling at a non-0 kinetic energy (KE). In B, when he leaves the dip, he has 0 KE. In C, he begins in the dip (at the position indicated) at a KE of 0. Since he is riding a skateboard, friction may be ignored. B lKE-Ohm 11% Part (e) The bulldog and skateboard have a combined mass of 20 kg. In case B (the middle of the three pictures of the bulldog and the well), the bulldog and skateboard have a KE of 380 J at the bottom of the well. How deep is the well in meters? h=1938 m Correct! 11% Part (f) Explain the reasoning you used in part (e). KE=PE=mgh N Answer Saved Successfully! 11% Part (g) In case 1 it says the KE is positive but the total energy is negative. How is this possible? Explain what it means for the total energy to be negative. negative total energy means the system is stable and no additional energy was added to it N Answer Saved Successfully! A 11% Part (h) In case 3, the total energy is 200 J. How fast is the bulldog when he passes the bottom of the well? Give your answer in m/s. Grade Summary V = m/s Deductions 0% Potential 109% Late Work % 100% sin() cos tan() JI 8 HOME Late Potential 100% cotan() asin() acos() E A A A 5 6 Submissions atan() acotan() sinh() 2 3 Attempts remaining: 6 (2% per attempt) cosh() tanh() cotanh() + 0 END detailed view O Degrees O Radians VO BACKSPACE DEL CLEAR Submit Hint Feedback I give up! Hints: 0 for a 0% deduction. Hints remaining: 0 Feedback: 0% deduction per feedback