Two students are on a balcony 19.6m above the street. One student throws a ball vertically downward at 14m/s; at the same instant the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way down. What is the difference in their time in air? What is the velocity of each ball as it strikes the ground? How far apart are the balls 0.800s after they are thrown?
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A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.90m/s^2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.00s before Kathy. If Stan moves with a constant acceleration of 3.50m/s^2 and Kathy maintains an acceleration of 4.90m/s^2, find the time it takes Kathy to overtake Stan, the distance she travels before she catches him, and the speeds of both cars at the instant she overtakes him.
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A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.90m/s^2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.00s before Kathy. If Stan moves with a constant acceleration of 3.50m/s^2 and Kathy maintains an acceleration of 4.90m/s^2, find the time it takes Kathy to overtake Stan, the distance she travels before she catches him, and the speeds of both cars at the instant she overtakes him.