The first fifteen questions (the multiple choice) are on the quiz in D2L, due Thursday, February 3 at 11:59 pm. The last three are not graded but you should do them anyway! Conceptual Questions 1. Which (if either) has the greater average speed: car A that travels from milepost 32 to milepost 37 in 5 minutes, or car B that travels from milepost 68 to milepost 78 in 10 minutes? a) car A has greater average speed b) car B has greater average speed c) same average speed for both 2. You are driving down the road with the cruise control set at 60 mi/hr. A deer jumps in front of you and you hit the brakes, bringing the car to a stop. Is your average speed while braking a) greater than b) equal to or c) less than 60 mi/hr? 3. You are traveling in the negative direction with a speed of 14 m/s. You slow down. Your acceleration must be a) zero b) positive c) negative 4. A book falls off a shelf and lands on the floor. Which is greater? a) book's average speed b) speed just before landing c) they are the same 5. You throw a rock straight down from atop a cliff with an initial speed of 10 m/s. Since the acceleration of gravity is negative, the rock must slow down. a) true b) false 6. A van goes 60 miles north, then 60 miles back south to its starting point. Which of the following is true? a) the van's distance traveled and displacement are equal, both 120 miles b) the van's distance traveled is 120 miles but its displacement is zero 7. Which of the following (if any) could not be considered an "accelerator" of an automobile? a) gas pedal b) brake c) steering wheel d) they are all "accelerators" 8. What happens to the acceleration of a rock in free fall if the rock's mass is cut in half? a) the rock's acceleration is cut in half also b) no change in the rock's acceleration c) the rock's acceleration doubles