Fred (mass 61 kg) is running with the football at a speed of 6.0 m/s when he is

Question

Fred (mass 61 kg) is running with the football at a speed of 6.0 m/s when he is met head-on by Brutus (mass 130 kg), who is moving at 4.4 m/s. Brutus grabs Fred in a tight grip, and they fall to the ground. Part A Which way do they slide? in the direction Fred was running in the direction Brutus was running My Answers Give Up Part B How far do they slide? The coefficient of kinetic friction between football uniforms and Astroturf is 0.30. Express your answer to two significant figures and include the appropriate units.Value Units Submit My Answers Give Up

Explanation / Answer

a) they slide in the direction Brutus was running as themomentum of Brutus is greater than that of Fred.

b) -m1 v1 + m2 v2 = (m1+m2) vf

-61 * 6.0 + 130 * 4.4 = (61 + 130) * vf

vf = 1.07853 m/s

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

vf^2 = 2 a d

1.07853 = 2* 2.94 * d

d = 0.18 m

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