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 car and the square of the car's speed. Suppose that  200  pounds of force keeps a  3200 -pound car from skidding on a curve of radius  400ft  at  25mph . What force would keep the same car from skidding on a curve of radius  550ft  at  55mph ?

Elementary Algebra
17th Edition
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:Lynn Marecek, MaryAnne Anthony-Smith
Chapter8: Rational Expressions And Equations
Section8.9: Use Direct And Inverse Variation
Problem 501E: The force needed to break a board varies inversely with its length. If Tom uses 20 pounds of...
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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 car and the square of the car's speed. Suppose that 

200

 pounds of force keeps a 

3200

-pound car from skidding on a curve of radius 

400ft

 at 

25mph

. What force would keep the same car from skidding on a curve of radius 

550ft

 at 

55mph

?

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