Lecture06 - Lecture 6 Continue Worksheet#1 Quiz Today you...

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Lecture 6 Continue Worksheet #1 Quiz Today you will learn Analyzing Free fall Parsing word problems
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Quiz6.1 Which of the following best describes the position-versus-time graph for a driver in a car who steps on the brakes after suddenly noticing pedestrians crossing the street? t = 0 is when the driver first notices the pedestrian. Assume it take some time for the driver to react before slamming on the brakes. A. B. D. C. Constant speed Slams brake to a stop. Position doesn’t change Reaction time
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Quiz6.2 Below is an acceleration-vs-time graph for a car initially moving along the +x-axis. At what time is the speed of the car the largest? A. t 1 B. t 2 C. t 3 D. At both t 1 and t 3 E. Not enough information 1 t 2 t 3 t a t Acceleration opposite to motion slows car back down to where it started
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Quiz6.3 Diego runs at 3.5 m/s for 30 minutes. At the end of the run, his position is A. 105 m B. 6.3 km C. -6.3 km D. -105 m E. Not enough information given. No coordinate system defined! Where is position 0? Which direction is he running?
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100 Free Fall: example of constant acceleration In an ideal free fall, gravity is the
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