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1. #0049A0E9 #0662CEAA #11059E8A #11999B13 #120AF8E0 #1236E9CD #12CB1CC5 #12D926ED #12F31AFB #13AECD70 #13DBC800 #13F149AB #13F555B3 #13F56284 #1919D2D2 #191C797C #195E2166 #1B9E2FAA #1BAAAA1B #1BB65AF7 #1BCCCF18 #1E0B6C79 #1E0BCDD8 #1E16050D • “All work and no play • makes Jack a dull boy” • Jack Torrance • All play and no work • makes Jack a mere toy - • Proverb Unregistered iClickers

2. Background SurveyPlease choose the FIRST true statement. A] I took physics in high school, and we talked a little about vectors. B] I’ve seen vectors before, but it wasn’t in a physics class. C] I took physics in high school, but we never talked about vectors at all. D] I never took physics in high school. All answers get two points. Answers will have no effect on how difficult this class is.

3. A balloon is accelerating upward from the ground with acceleration a. After a brief time, a sandbag is “dropped”. Choose any TRUE statement: A] There is an instant after dropping and before hitting the ground when the bag’s acceleration is zero B] There is an instant after dropping and before hitting the ground when the bag’s velocity is zero C] The bag initially (right after dropping) moves upward, relative to the balloon D] The bag initially (right after dropping) has v=0 E] The bag initially (right after dropping) has upward acceleration a.

4. A hobo physicist wishes to jump into an open boxcar, and needs to accelerate from v=0 so that his velocity and the train’s velocity are equal. The train is moving 2 m/s. The physicist accelerates at 0.5 m/s2. Where should he start running? A] 4 m ahead of the door B] 4 m behind the door D] 8 m ahead of the door E] Not enough info C] even with the door

5. Dog Chases Rabbit A dog sees a rabbit and gives chase, with constant acceleration. At time t0, the rabbit sees the dog and flees, at twice the acceleration. When does the dog catch the rabbit? A] t0 B] 2t0 C] 3t0 D] 4t0 E] not enough info to tell

6. Rabbit’s-Eye View Assuming the dog does NOT catch the rabbit, at what point is it closest to the rabbit? Or Choose[E], cannot tell from this graph alone.