Two football players are pushing a 60kg blocking sled across the field at a constant speed of 2.0 m/s. The coefficient of kinetic friction between the grass and the sled is 0.30. Once they stop pushing, how far will the sled slide before coming to rest

Question

Corbin Gillespie

Physics

9 May, 10:54

Two football players are pushing a 60kg blocking sled across the field at a constant speed of 2.0 m/s. The coefficient of kinetic friction between the grass and the sled is 0.30. Once they stop pushing, how far will the sled slide before coming to rest

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Answers (1)

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Nadia Allen · Answer 1

The sled slides 0.68m before rest.

Explanation:

Vi = 2 m/s

m = 60kg

μ = 0.3

N = m * g = 60kg * 9.8 m/s² = 588 N

Fr = μ * N

Fr = 176.4 N

a = Fr/m

a = - 2.94m/s²

t = Vi/a

t = 0.68 seg

d = Vi*t - a*t²/2

d = 0.68m