1. ...man will occasionally stumble over the truth, but usually manages to pick himself up, walk over or around it, and carry on. -Winston Churchill Homework Hint 2.21 Sketch a v vs t graph!

2. Quiz #1 What can you conclude about the (1D) average velocities of car1 and/or car2, between t=0 and t=t F ? A] V 1 =V 2 B] V 1 =-V 2 C] V 1 < 0 D] V 2 =0 E] None of the above

3. Quiz #2 (Use paper!) You take a straight line bike trip of 40 miles due North. The first 20 miles you ride at 20 mph. The next 20 miles you ride at 10 mph. What is your average velocity? A] 0 mph B] 3 mph N C] 13.3 mph N D] 15 mph N E] 30 mph N

6. Predict: What will be the graph of velocity v time? Predict: What will be the graph of acceleration v time? B E