3.74 s, +36.7 m/s, -36.7 m/s, 68.5 m, +19.1 or -19.1 m/s 1. Helen Wheels launches a rocket in the air for a total of 7.48 seconds. What time did it spend.

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Presentation transcript:

3.74 s, m/s, m/s, 68.5 m, or m/s 1. Helen Wheels launches a rocket in the air for a total of 7.48 seconds. What time did it spend going up? What is its initial velocity? What is its final velocity? How high did it go? What is the rocket's velocity at an elevation of 50.0 m? (Why are there two answers?)

12.8 m/s, m/s, 8.3 m, -8.0 m/s, +5.1 m 3. Freda Heitz throws a ball up from the roof of a building at a height of 21.7 m. It strikes the ground 3.78 seconds later. What is the initial velocity of the ball? With what velocity does the ball hit the ground? How high above the building does the ball go? What is the velocity and displacement 2.12 seconds after the ball was released?

4.74 s, -33.1m/s, 110 m 4. Catona Hotinruff is ascending in a helicopter at a rate of 13.3 m/s. At an elevation of 47.0 m, she drops a bagel out the window of the 'copter. What time does the bagel take to reach the ground? What is its velocity of impact? How high is the helicopter when the bagel hits the ground?

5.94 s, 60.7 m, m/s 7. Justin Case fires an air rocket upward at 34.5 m/s from ground level. Unfortunately (for him) the rocket lands on the top of a 32.0 m tall light tower on its way down. What time is the rocket in the air? How high does the rocket go? With what velocity does it strike the tower?

7.17 s, 1.52 s (going up), 5.66 s (going down) 8. Molly Fayad pops a softball up that ends up being caught by the catcher at the same elevation as she hit it. A spectator, using a sextant, and a range finder, determines that the ball went 63.0 m into the air at its highest point. For what total time was the ball in the air? At what times is the ball at an elevation of 42.0 m?