Answer:
You are asked to find the skid distance given the speed,
the drag factor, and the braking efficiency.
Step-by-step explanation:
Use the skid speed formula. S = β
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30Dfn
Substitute 50 for S, 1.2 for f,
and 0.9 for n. 50 =β
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30 Γ D Γ 1.2 Γ 0.9
Simplify the expression under the radical. 50 = β
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32.4D