A bowling ball is dropped from the top of a building that has a height of h = 104 m. a.  Assuming air resistance is negligible, what is the ball's speed, vf in m/s, when it strikes the ground?  b. If drag produces an opposing force of 10 N while the ball's falling, what is the ball's speed, vf in m/s, when it strikes the ground? Assume the ball has a mass of 5 kg.  c. A different ball was dropped and the final speed was measured to be vf = 8.5 m/s while the drag force was measured to be 50 Newtons. What is the mass of this ball in kg?

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