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Officer Friendly measured the length L of car skid marks when the brakes were applied at different starting speeds S. He obtained the following data.
a. Graph the given data.
b. Find a general variation equation to represent the situation.
c. Find the value of the constant of variation and use it to rewrite the variation equation.
d. Use your variation equation from Part c to answer the question.
How far would a car skid if the brakes were applied at 150 kph ?
An object is tied to a string and then twirled in a circular motion. The tension in the string varies directly as the square of the speed of the object and inversely as the length of the string. When the length of the string is 2 ft and the speed is 3 ft/sec, the tension on the string is 130 lb. If the string is shortened to 1.5 ft and the speed is increased to 3.4 ft/sec, find the tension on the string.
The force required to prevent a car from skidding on a flat curve varies directly as the weight of the car and the square of its speed, and inversely as the radius of the curve. It requires 290 lb of force to prevent a 2,200 lb car traveling at 35 mph from skidding on a curve of radius 520 ft. How much force is required to keep a 2,800 lb car traveling at 50 mph from skidding on a curve of radius 415 ft ?
varies directly as and varies inversely as a square of .
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