MasteringPhysics Chapter 9-Google Chrome https://session.masteringphysics.com/my

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MasteringPhysics Chapter 9-Google Chrome https://session.masteringphysics.com/myct/itemView?ass Phys201-2016-Spring mID-56099977 Chaper9 Problem 9.44 previous 10 of 19 Problem 9.44 Part A Fred (mass 65 kg ) is running with the football at a speed of 5.8 m/s when he is met head-on by Which way do they side? Brutus (mass 130 kg ) who is moving at 4 3 m/s Brutus grabs Fred in a tight grip and they tall to the ground in the direction Brutus was running in the direction Fred was running My Answers ive Correct Part B How far do they slide? The coefficient of kinetic friction between footbalf urifoms and Astroturf is 0 30 Express your answer to two significent figures and include the appropriate units. 14 Incorrect; Try Again; 6 attempts remaining Contnue 0

Explanation / Answer

in the direction brutus was running

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Pix = Pfx

vf = (130 * 4.3 - 65 * 5.8 ) / (130 + 65) = 0.933 m/s

a = -mu * g = -0.3 * 9.8 = -2.94 m/s2

vf2 = vi2 + 2 a d

d = -vf2 / 2 a

= 0.9332 / 2 * 2.94 = 0.15 m = 15 cm

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