Quiz 1

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Arizona State University *

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Apr 3, 2024

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3/1/24, 11:37 PM Quiz 1 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 1/8 Quiz 1 Due: 11:59pm on Tuesday, January 16, 2024 You will receive no credit for items you complete after the assignment is due. Grading Policy Conceptual Question 2.13 Part A An object is moving in a straight line along the x- axis. A plot of its velocity in the x- direction as a function of time is shown in the figure. Which graph represents its acceleration in the x- direction as a function of time? ANSWER:

3/1/24, 11:37 PM Quiz 1 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 2/8

3/1/24, 11:37 PM Quiz 1 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 3/8 Correct Conceptual Question 2.01 Part A If the acceleration of an object is negative, the object must be slowing down. ANSWER: Correct Conceptual Question 2.03 True False

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3/1/24, 11:37 PM Quiz 1 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 4/8 Part A If an object is accelerating toward a point, then it must be getting closer and closer to that point. ANSWER: Correct Conceptual Question 2.15 Part A The figure shows the velocity of a particle as it travels along the x -axis. What is the direction of the acceleration at t = 0.5 s? ANSWER: Correct Problem 2.10 True False in the + x direction in the - x direction The acceleration is zero.

3/1/24, 11:37 PM Quiz 1 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 5/8 Part A The position of an object as a function of time is given by x = bt 2 - ct , where b = 2.0 m/s 2 and c = 6.7 m/s, and x and t are in SI units. What is the instantaneous velocity of the object when t = 4.0? ANSWER: Correct Reading Question 2.05 Part A Here is a motion diagram of a car speeding up on a straight road: The sign of the acceleration is ANSWER: 11.2 m/s 13.0 m/s 9.3 m/s 7.4 m/s

3/1/24, 11:37 PM Quiz 1 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 6/8 Correct Correct! Reading Question 2.06 Part A A ball is tossed straight up in the air. At its very highest point, the ball's instantaneous acceleration is ANSWER: Correct Reading Question 2.04 Part A At the turning point of an object, ANSWER: Positive. Negative. Zero. upward. downward. zero. only the instantaneous velocity is zero. only the acceleration is zero. both the instantaneous velocity and the acceleration are zero. neither the instantaneous velocity nor the acceleration is zero.

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3/1/24, 11:37 PM Quiz 1 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 7/8 Correct Conceptual Question 2.16 Part A The figure represents the velocity of a particle as it travels along the x -axis. At what value (or values) of t is the instantaneous acceleration equal to zero? ANSWER: Correct Conceptual Question 2.02 Part A If the graph of the position as a function of time for an object is a horizontal line, that object cannot be accelerating. ANSWER: t = 0 t = 0.5 s and t = 2 s t = 1 s

3/1/24, 11:37 PM Quiz 1 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 8/8 Correct Score Summary: Your score on this assignment is 100%. You received 10 out of a possible total of 10 points. True False

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