Homework # 15 - Velocity and Distance with Acceleration Handout Problems: 1. A youngster throws a ball vertically upward. As the ball rises to its highest point and then falls, what changes, if any, take place in (a) its velocity; (b) its acceleration? 2. A feather and a rock are dropped from the top of a tower. Neglecting air resistance, which of the two will land on the ground first? Why will the rock land first in actuality? Which would land first if the experiment were done on the Moon? Explain. 3. A ball is thrown vertically upward. Once it reaches its maximum height what will be its (a) speed? (b) acceleration? 4. A bullet shot vertically upward with muzzle velocity of 600 m/s rises and then falls back to its starting point. With what speed will it strike the ground [neglecting air friction ]? 5. An object falls to the floor from a shelf 2.5 m high. With what speed does it strike the floor? [Neglect the effects of air resistance ] 6. A bullet shot vertically upward has an initial speed of 588 m/s. [Neglect air resistance] (a) How high does the bullet go in this time? (b) How long does it take for the bullet to reach its highest point? 7. A 10. kilogram object, starting from rest, slides down a frictionless incline with a constant acceleration of 2.0 m/s2 for 4.0 seconds. What is the velocity of the object at the end of the 4.0 seconds? 8. An arrow is shot straight up with an initial speed of 49 m/s. (a) What will its position above the ground be 10. seconds after it is fired? (b) How fast will it be going at that time