1. Vertical Motion Air resistance Weight Shape Surface area

2. Analysis Net force direction? Likely motion? Net force direction? Type of motion?

3. Definitions/equations Speed Acceleration Big “d” equation Cart lab equation

4. That’s how fast?!? A person walking? An Olympic person running 100m? (men 9.58 sec; women 10.49) A car at 30 mi/hr? A car at 70 mi/hr? Radius of earth’s orbit = 1.5 x 10 11 m – Speed of orbit in km/hr and m/s.

5. Reaction time challenge Things to use: – Calculator – Ruler – Equations Find the reaction time of each group member—multiple trials.

6. 2-D motion (in air) Analyze motion of the object with a constant speed to the right. 2 m/s What are the horizontal forces acting on the object? Volunteer needed Laser disc 2-d motion

7. Which hits first? Question 2 of the FCI (pre-test) What forces act on each ball to make it move? Which ball hits the ground first? Q3: What forces are acting on each ball? Which travels farther?

8. Orbital motion What forces must be acting on an object to make it follow a circular path? – Plates with ball bearing???