A winter tire test was conducted on the Olympic-sized hockey rink in Steamboat Springs Colorado. The best tire was measured to stop a vehicle from 12 mph to 0 in 30.8 feet. Use the same assumptions as Problem 1 to determine the following. a. acceleration measured in ft/s2 b. elapsed time measured in seconds c. static coefficient of friction
A winter tire test was
a. acceleration measured in ft/s2
b. elapsed time measured in seconds
c. static coefficient of friction
2. On February 21, 2021 United Airlines Flight 328 suffered a catastrophic engine failure at an altitude of 13,500 feet above ground shortly after departure from Denver International Airport. Parts from the engine fell to the ground in Broomfield, Colorado. If the parts initially accelerated towards Earth based on the equation given below, determine elapsed time from separation to impact. Assume initial vertical velocity is zero.
a = -32-0.2v (a is ft/s2 and v is ft/s)
Analysis of this problem up to terminal velocity is relatively difficult. Analysis after terminal velocity is relatively easy. If you are lost on the first part, use terminal velocity for the entire trajectory for partial credit.
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