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practice test 1 - PRACTICE TEST#1 Physics 85 1 A ball is...

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PRACTICE TEST #1 Physics 85 1. A ball is thrown straight up. When the ball reaches the highest point (a) both its velocity and its acceleration are zero (b) its velocity is zero and its acceleration is not zero (c) its velocity is not zero and its acceleration is zero (d) neither its velocity nor its acceleration is zero 2. Two objects are thrown from the top of a tall building. One is thrown up, and other is thrown down, both with the same initial speed. What are their speeds when they hit the street? (a) The one thrown up is traveling faster (b) The one thrown down is traveling faster (c) They are traveling at the same speed (d) It is impossible to tell because the height of the building is not given 3. Which of the following is accurate statement? (a) A vector cannot have zero magnitude if one of its components is not zero. (b) The magnitude of a vector can be less than the magnitude of one of its components. (c) If the magnitude of vector A is less than the magnitude of vector B, then the x-component of A is less than x-component of B. (d) The magnitude of a vector can be positive or negative.
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