Mastering Physics: Ch 7 HW Google Chrome Secure https://session masteringphysics

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Mastering Physics: Ch 7 HW Google Chrome Secure https://session masteringphysics.com/myct/itemview?assignmentProblemID 73337490 PHY143 W 17 College Physics Tarini 7.13 Enhanced with Feedback Problem 7.13 Enhanced with Feedback Part A To throw the discus, the thrower holds it with a tully outstretched arm If the thrower takes sto complete one revolution, starting fom rest what wil be the speed of the discus at teloase? Starting from rest, he begins to tum with a constant angular Express your answer using two significant figures. acceleration, releasing the discus after making one complete revolution. The diameter of the circe in which the discus moves is about 16 m You may want to review (O pages 195-198) Submit My Answers Up Incorrect: Try Again: 5 attempts remaining

Explanation / Answer

here

1 rev = 6.283 radians

6.283/(1.1sec/2) = (u + v) = 11.42

u = 0

v = 11.42 rad/s

tangential velocity = rad/s * radius

radius = 1.6/2 = 0.8 m

11.42 * 0.85 = 9.707 m/s

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