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When two lines intersect, they form two pairs of equal angles, which, taking one of each, add up to 180°. (jargon: angles forming a straight line show more
the speed of the vehicle should be 57.68 ft/s Step-by-step explanation: Given: child is running ahead of vehicle by 65-70 ft. we are given with range of stopping distance The stopping distance is calculated by where μ = 0.8, coefficient of static friction g = 32ft/s² now, at d = 65 ft. v = 7.155√(65) = 57.68 ft/s at d = 70 ft. v = 7.155√(70) = 59.86 ft/s To be safe, the speed of the vehicle should be 57.68 ft/s
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