Rebrand) Xbox f Facebook (Dinstagram Pinte rest Class Management I Help Chapter

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Rebrand) Xbox f Facebook (Dinstagram Pinte rest Class Management I Help Chapter 4 H.W. Begin Date: 1/8/2018 1200:00 AM-Due Date: 2/4/2018 11:59:00 PM End Date: 2/5/2018 1200:00 AM (20%) Problem 5: A runner runs around a circular track. He completes one lap at a tine of 484 s at a constant speed of v-3.1 m/s. Randomized Variables t=484 s v 3.1 m/s Status e for 50% Part (a) What is the radius, r in meters, of the track? 50% Part (b) What was the runners centripetal acceleration, ae in m's, during the run? Grade Summa Deductions Potential Status Completed coan asin acos0 acotanO sinh0 4 5 6 12 3 Submissions Attempts remain 0% per attemp detailed vew Completed Partial cotanD cosh0 tanh0 cotanhO Degrees Radians Submit Hint I give up Hints: deduction per hunt. Hints remaining Feedback:deduction per feedback

Explanation / Answer

time = 484 sec

Speed = 3.1 m/sec

We know that

distance = Velocity*time

d = 3.1*484

Now d = circumference of circle

d = 2*pi*r

r = d/(2*pi) = 3.1*484/(2*pi)

r = 238.80 m

B.

ac = V^2/r

ac = 3.1^2/238.80

ac = 0.040 m/sec^2

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