1. Chapter 2, Part 3 September 7, 2005

2. A ball is thrown downward (not dropped) from the top of a tower. After being released, its downward acceleration will be 60 12345 1.greater than g=9.8 m/s 2. 2.exactly equal to g=9.8 m/s 2. 3.less than g=9.8 m/s 2. 4.need more information.

3. You throw a ball straight up into the air. After it leaves your hand, at what point in its flight does it have the maximum value of acceleration? 60 12345 1.Just after it leaves your hand. 2.At the top of its trajectory. 3.Halfway to the top of its trajectory. 4.Its acceleration is constant. 5.Just before it returns to your hand on the way down.

4. When throwing a ball straight up, which of the following is true about its velocity v and its acceleration a at the highest point in its path? 1.Both v = 0 and a = 0. 2.v ≠ 0, but a = 0. 3.v = 0, but a ≠ 0. 4.Both v ≠ 0 and a ≠ 0. 5.Not really sure. 6 12345

5. A person standing at the edge of a cliff throws one ball straight up and another ball straight down at the same initial speed. Neglecting air resistance, the ball to hit the ground below the cliff with the greater speed is the one initially thrown 60 12345 1.upward. 2.downward. 3.neither – the both hit at the same speed.