document.write( "Question 1047148: The force needed to keep a car from skidding on a curve varies inversely as the radius of the curve and jointly as the weight of the care and the square of the speed. It 247-lb of force keeps a 1200-lb car from skidding on a curve of radius 400 ft. at 35 mph, what force would keep the same car from skidding on a curve of radius 850 ft. at 60 mph?
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Algebra.Com's Answer #662657 by Alan3354(69443) $\"\"$ $\"About$

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The force needed to keep a car from skidding on a curve varies inversely as the radius of the curve and jointly as the weight of the care and the square of the speed.
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\n" ); document.write( "F = k*(1/r^2)*W*(1/v^2) --- k = a constant, r = radius, v = speed
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\n" ); document.write( "Step 1, solve for k
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\n" ); document.write( "F = k*(1/400^2)*1200*(1/35^2) = 247
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\n" ); document.write( "Solve for k, then use k for the calculations.
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\n" ); document.write( "It 247-lb of force keeps a 1200-lb car from skidding on a curve of radius 400 ft. at 35 mph, what force would keep the same car from skidding on a curve of radius 850 ft. at 60 mph?
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