Question 1204635
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 640 pounds of force keeps a 2600-pound car from skidding on a curve of radius 650 at 40 mph. What force would keep the same car from skidding on a curve of radius 750 ft at 30 mph?


F{{{(alpha)}}}(1/r)(W)(s^2)

F= k * w*s^2/r

640 *650=K *2600*(40)^2

k=0.1

F = 0.1*2600*30^2/750

F=312