Falling body When an object falling from rest encounters
Chapter 6, Problem 95(choose chapter or problem)
Falling body When an object falling from rest encounters air resistance proportional to the square of its velocity, the distance it falls (in meters) after t seconds is given by d1t2 = m k ln acosh a B kg m tb b, where m is the mass of the object in kilograms, g = 9.8 m>s2 is the acceleration due to gravity, and k is a physical constant. a. A BASE jumper 1m = 75 kg2 leaps from a tall cliff and performs a ten-second delay (she free-falls for 10 s and then opens her chute). How far does she fall in 10 s? Assume k = 0.2. b. How long does it take her to fall the first 100 m? The second 100 m? What is her average velocity over each of these intervals?
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