Mastering Physics: HW 7.1 LP X https:// session.masteringphysics.com 5604-4064 U

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Mastering Physics: HW 7.1 LP X https:// session.masteringphysics.com 5604-4064 University Physics I Signed in as Mariah McAfoos Help Close HW 7.1 Exercise 7.12 Resources previous 5 of 5 return to assignment Exercise 7.12 Part A Tarzan, in one tree, sights Jane in another tree. He grabs the Calculate Tarzan's speed just before he reaches Jane. You can ignore air resistance and the mass of the vine end of a vine with length 20 m that makes an angle of 45 Express your answer using two significant figures with the vertical, steps off his tree limb, and swings down and then up to Jane's open arms. When he arrives, his vine makes an angle of 30 o with the vertical. m/s Submit My Answers Give U Continue Provide Feedback

Explanation / Answer

the difference in height = L (cos30 - cos45) = 20 * (cos30 - cos45) = 3.17836 m

the speed of the tarzan is, v = 2gh = 2*9.8*3.17836 = 7.89 m/s
This is a fast speed, almost 20 mph, so he knocks her off the limb.

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