Ch 2 3 quizzes

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Unformatted text preview: 2004 Quizzes Physics Honors Chapter 2 Quiz 1. Which of the following can never be a negative quantity? A. Average velocity B. Displacement C.* Instantaneous speed D. gravitational acceleration E. not covered in the assigned reading. Can an object's velocity change direction when its acceleration is constant? A. No, this is not possible because it is always speeding up. B. No, this is not possible because it is always speeding up or always slowing down, but it can never turn around. C.* Yes, this is possible, and a rock thrown straight up is an example. D. Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and then backs up is an example. E. Not covered in the assigned reading Can an object have increasing speed while its acceleration is decreasing? A. No, this is impossible because of the way in which acceleration is defined. B. No, because if acceleration is decreasing the object will be slowing down. C. Yes, and an example would be an object falling in the absence of air friction. D.* Yes, and an example would be an object dropped from rest in the presence of air friction. E. Not covered in the assigned reading. Provided by Ben Lui 2. 3. 4. Suppose that an object is moving with constant acceleration. Which of the following is an accurate statement concerning its motion? A. In equal times its speed increases by equal amounts. B.* In equal times its velocity changes by equal amounts. C. In equal times it moves equal distances. D. None of these are true. E. Not covered in the assigned reading. A ball is thrown straight up. What is its instantaneous acceleration just before it reaches its highest point? A. Zero B. Slightly less than g. C.* Exactly g. D. Slightly greater than g. E. Not covered in the assigned reading Objects A and B both start at rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. After the acceleration, object A is moving __________ as object B. A. at the same speed B.* twice as fast C. three times as fast D. four times as fast E. Not covered in the assigned reading. Objects A and B both start from rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. During the times that the objects are being accelerated, compare the distance traveled by object A to that of object B. After the acceleration, object A has traveled __________ as object B. A. the same distance B. twice as far C. three times as far D.* four times as far E. Not covered in the assigned reading. Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. As time progresses, the distance between them A.* increases. B. remains constant. C. decreases. D. cannot be determined from this information. E. Not covered in the assigned reading. How is motion in the negative direction represented on a position vs time graph? A. By a curve to the left of the origin. B. By a curve below the horizontal axis. C.*...
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This note was uploaded on 08/29/2010 for the course PHYS 38234 taught by Professor Ramesh during the Spring '09 term at University of California, Berkeley.

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