Physics 31

Chapter 2 slides (part 1): download
Chapter 2 (part 2) and Chapter 3: download
Chapter 4 (part1) : download

Hey kids, sorry I didn't have internet access yesterday and I wasn't able to type up the problems.

3.30: An athlete executing a long jump leaves the ground at a 30degree angle and travels 7.90m. (a) What was the takeoff speed? (b) If this speed were increased by just 5.0 percent, how much longer would the jump be?


3.32 A hunter aims directly at a target (on the same level) 120 m away. (a) If the bullet leaves the gun at a speed of 250 m/s, by how much will it miss the target? (b) at what angle should the gun be aimed so the target will be hit?


3.34 A projectile is fired with an initial speed of 40.0 m/s. Plot (on graphing paper) its trajectory for initial projection angles of 15degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees and 90 degrees. Plot at least 10 points on each curve.

don't forget our "surprise" tomorrow on free body diagrams ;)