HW#10 Begin Date: 9192018 12:01:00 AM-Due Date: 921/2018 10:00 00 AM End Date: 9

Question

HW#10 Begin Date: 9192018 12:01:00 AM-Due Date: 921/2018 10:00 00 AM End Date: 9/21/2018 10:00:00 AM (50%) Problem 1: A fireworks shell is accelerated at constant acceleration from rest to a velocity of 66 m s over a distance of S m p à 5096 Part (a) How long, in seconds, does the acceleration last? Grade Summary Deductions Potential 1006 Submissions asin acos0 (3le per atempt) detailed view atan0 acota in Degrees Radians Subenit Hint cosh tan cota0 0 Hiat: 3lo deduction per hint Hints remaing I Feedback: deduction per feedback 5096 Part (b) Calculate the acceleration, in meters per second squared

Explanation / Answer

using the equation

v^2 - u^2 = 2aS

66^2 - 0 = 2*a*5

a = 435.6 m/s2

v= u + at

t = (v - u) / a

= (66- 0) / 435.6 = 0.15 s

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