k.theexpertta.com/Common/Take TutorialAssignment.a l Help Date: 1/17/2018 12:000

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k.theexpertta.com/Common/Take TutorialAssignment.a l Help Date: 1/17/2018 12:0000 AM-Due Date: 2/5/2018 11 5900 PM End Date: 2/5/2018 11:59 00 PM Class Homework 2 Begin (8%) Problem 3: Achild throws a penny off of the Eiffel tower ( 324 m) with a downward velocity of magnitude p',-11 m/s K V 33% Part (a) Select from below the correct expresson for the time t t takes for the penny to reach the grou Neglect air re 33% Part (b) Calculate the time , in seconds that t takes for the petiny to fill Grade Summary Poteetial 100 tanO cotan asin)acos atan0 acotan)sinh Attempts remaining (0% pef attempt) detailed vien cosh tanbo cotanho 0% e Degrees Radians I give up Sedection per feedback Hints: 29. deduction per ha! Hints emaining:1 Feedback: 33% Part (c) Find the speed at which the penny strikes the ground distance, h in meters per second, usng the initial velocity. P and the drop

Explanation / Answer

b) t = [sqrt(v0^2 + 2 g h) - v0]/g

t = [sqrt(11^2 + 2 x 9.8 x 324)- 11]/9.8 = 7.09 s

Hence, t = 7.09 s

c)from eqn of motion

v = u + at

v = vf ; u = v ; a = +g = 9.8 ; t = 7.09 s

vf = 11 + 9.8 x 7.09 = 80.45 m/s

Hence, v = 80.45 m/s

Please rate my answer, good luck...

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