(5%) Problem 19: A person throws a quarter off of the willis tower (h 324 m) wit
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Question
(5%) Problem 19: A person throws a quarter off of the willis tower (h 324 m) with a downward velocity of magnitude p 0 4 m/s. 33% Part (a) Select from below the correct expression for the time , it takes for the quarter to reach the ground. Neglect air resistance. Correct 3396 Part (b) Calculate the time t, in seconds, that it takes for the quarter to fall. Grade Summary Deductions Potential 100% sino l cos() | tan() | 1(E171819 cotan) asin acos( atan) acotan)sinh cosh tanho cotanh) Submissions Attempts remaining 200 (0% per attempt) detailed view :123 0 Degrees Radians NO Submit grve up deduction per feedback Hint Hints: 0 deduction per hint. Hnts remainang Feedback: 0 33% Part (c) distance, h. Find the speed at which the quarter strikes the ground Vf in meters per second, using the initial velocity, Vo-and the dropExplanation / Answer
t= ( Vo^2+2gh)^1/2-Vo/g
t= (4^2+ 2×9.8×324)^1/2- 4/9.8= 7.73s
Final velocity
Apply third equation of motion
V^2= u^2+2gh
V= (u^2+2gh)^1/2
V= ( 4^2+ 2×9.8×324)^1/2= 79.789m/s
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