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Veronika [31]
4 years ago
12

A 20.0 kg sled is being pulled across a horizontal surface at constant velocity. The pulling force has a magnitude of 80.0N and

is directed at an angle of 30.0º above the horizontal. Determine the coefficient of kinetic friction.
Mathematics
1 answer:
SSSSS [86.1K]4 years ago
7 0
U = F/R = 80/200cos30
u = 80/100√3
u= 0.46
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Answer:

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Step-by-step explanation:

Let's assume that

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v_1\ =\ 20i\ +\ 25j

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v_2\ =\ 30i

=> speed of first car,

u_1\ =\ \sqrt{(20)^2+(25)^2}

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       = 32.01 units

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u_2\ =\ \sqrt{(30)^2+(0)^2}

        = 30 units

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Answer:

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-.48x + 81.6 = 69.6 ( subtract 81.6 on each side)

-.48x = -12 (divide -12 by -.48)

x = 25

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