1. Projectile Motion http://www.youtube.com/watch?v=i0me1ta vPKY&feature=related http://www.youtube.com/watch?v=i0me1ta vPKY&feature=related

2. Projectile motion http://www.youtube.com/watch?NR=1&v= TNi0Jdmz9Jk http://www.youtube.com/watch?NR=1&v= TNi0Jdmz9Jk

3. PRACTICE Review sample problem 3D, p. 101 Practice 3D, p. 102, problems 1 - 4 Answers : 1. 0.66 m/s 2. 4.9 m/s 3. 7.6 m/s 4. 5.6 m

4. Problems 1 – 4, p. 102 1. An autographed baseball rolls off of a 0.70 m high desk and strikes the floor 0.25 m away fro the base of the desk. How fast was it rolling? 2. A cat chases a mouse across a 1.0 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the floor 2.2 m from the edge of the table. What was the cat’s speed when it slid off the table?

5. (cont.) 3. A pelican flying along a horizontal path drops a fish from a height of 5.4 m. The fish travels 8.0 m horizontally before it hits the water below. What is the pelican’s initial speed? 4. If the pelican in item 3 was traveling at the same speed but was only 2.7 m above the water, how far would the fish travel horizontally before hitting the water below?

6. Additional practice if needed 34/115 The fastest recorded pitcher in major League Baseball was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, the ball would fall 0.809 m (2.65 ft) by the time it reached home plate, 18.3 m (60 ft) away. How fast was Ryan’s pitch? (45.1 m/s) 36/115 A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 18 m/s. The cliff is 52 m above the earth’s surface. How long does it take for the stone to fall to the water? (3.3 sec) With what speed does it strike the water? (36 m/s)

7. Projectile Motion Project Due Date: http://www.youtube.com/watch?v=r5- QWISz93k http://www.youtube.com/watch?v=r5- QWISz93k http://www.youtube.com/watch?v=UksW7 DLxx8k&feature=related http://www.youtube.com/watch?v=UksW7 DLxx8k&feature=related Quiz: Projectiles next class