Class Management I Help 7.4-8.2 Begin Date: 8/1/2017 12:00:00 AM -- Due Date: 9/
ID: 3279859 • Letter: C
Question
Class Management I Help 7.4-8.2 Begin Date: 8/1/2017 12:00:00 AM -- Due Date: 9/27/2017 11:00:00 AM End Date: 12/8/2017 11:00:00 AM (10%) Problem 7: Consider dropping a basketball a distance of 2 meters -/S 50% Part (a) If you did this at sea level, call the change in potential energyUp and if you did this at an altitude of 300 m, call the change in potential energy 1. Which of the following correctly specifies the relative sizes of these potential energy changes? Grade Summary Deductions Potential It is impossible to determine 0% 100% Submissions Attempts remaining:3 (33% per attempt) detailed view Submit Hint I give up Hints: 2% deduction per hint. Hints remaining: 1 Feedback: 0% deduction per feedback. 50% Part (b) How do the final potential energies, Ur and Ulf, compare to each other?Explanation / Answer
Change in potential energy is same for both the cases as the basketball is dropped by only 2metres in both the cases.
Refrence point ,where the potential is considered zero is arbitrary.
Therefore (b) is correct. dUo = dU1
U1,f is more than U0,f as it is potential energy at a height of 300m
f in subscript means,potential at a point when ball has dropped 2metres.
U1,f > Uo.,f.