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StraighterLine PHY 250 General Physics I All Graded Exams What is the acceleration of a skydiver at terminal velocity whose mass is 80 kg and cross-sectional area is 14 m . The density of the air he is falling through is 0.9984 g /m . The drag coe_cient has a value of 0.485. Select one: a. 15.2 m /sec b. 56.4 m /sec c. 0 m /sec d. 481 m /sec e. None of the above The correct answer is: 0 m /sec Calculate , where v = 0.227 m/s, t = 11.1s, and . Select one: a. 606.2487 m b. 606 m c. 605.5 m d. 606.249 m The correct answer is: 606 m Which of the following statements concerning an object in free fall through the atmosphere is incorrect? Select one: a. Air resistance opposes the motion of an object moving through air and exists because a moving object collides with air molecules. b. The speed of a falling object increases due to the frictional force of air drag. c. Given two spherical objects made of the same material and dropped from the same height, the one with the larger cross-sectional area will experience increased air resistance. d. When the magnitude of the air drag equals that of the object's weight, the net force on the object is zero. The object then falls with a maximum constant velocity called the terminal velocity. The correct answer is: The speed of a falling object increases due to the frictional force of air drag. 2 3 2 2 2 2 2