Quiz 5

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Arizona State University *

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121

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Aerospace Engineering

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Apr 3, 2024

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3/1/24, 11:41 PM Quiz 5 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 1/6 Quiz 5 Due: 11:59pm on Tuesday, February 13, 2024 You will receive no credit for items you complete after the assignment is due. Grading Policy Conceptual Question 11.03 Part A You are standing on a skateboard, initially at rest. A friend throws a very heavy ball towards you. You can either catch the object or deflect the object back towards your friend (such that it moves away from you with the same speed as it was originally thrown). What should you do in order to MINIMIZE your speed on the skateboard? ANSWER: Correct Conceptual Question 11.06 Part A A small glider is coasting horizontally when suddenly a very heavy piece of cargo falls out of the bottom of the plane. You can neglect air resistance. Just after the cargo has fallen out ANSWER: Catch the ball. Deflect the ball. Your final speed on the skateboard will be the same regardless whether you catch the ball or deflect the ball. neither the cargo nor the plane change speed. the plane speeds up and the cargo slows down. the plane speeds up but the cargo does not change speed. the cargo slows down but the plane does not change speed. both the cargo and the plane speed up.
3/1/24, 11:41 PM Quiz 5 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 2/6 Correct Conceptual Question 11.08 Part A In a collision between two objects having unequal masses, how does magnitude of the impulse imparted to the lighter object by the heavier one compare with the magnitude of the impulse imparted to the heavier object by the lighter one? ANSWER: Correct Problem 11.03 Part A A firecracker breaks up into several pieces, one of which has a mass of 200 g and flies off along the -axis with a speed of 82.0 m/s. A second piece has a mass of 300 g and flies off along the -axis with a speed of 45.0 m/s. What are the magnitude and direction of the total momentum of these two pieces? ANSWER: Both objects receive the same impulse. The lighter object receives a larger impulse. The heavier object receives a larger impulse. The answer depends on the ratio of the masses. The answer depends on the ratio of the speeds.
3/1/24, 11:41 PM Quiz 5 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 3/6 Correct Problem 11.24 Part A A car heading north collides at an intersection with a truck of the same mass as the car heading east. If they lock together and travel at 28 m/s at 40° north of east just after the collision, how fast was the car initially traveling? Assume that any other unbalanced forces are negligible. ANSWER: Correct Conceptual Question 9.04 Part A Two men, Joel and Jerry, push against a wall. Jerry stops after 10 min, while Joel is able to push for 5.0 min longer. Compare the work they do. 361 kg·m/s at 0.983° from the -axis 21.2 kg·m/s at 39.5° from the -axis 21.2 kg·m/s at 56.3° from the -axis 361 kg·m/s at 56.3° from the -axis 93.5 kg·m/s at 28.8° from the -axis 72 m/s 18 m/s 27 m/s 36 m/s
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3/1/24, 11:41 PM Quiz 5 4/6 ANSWER: Correct Conceptual Question 9.06 Part A A 3.00-kg ball swings rapidly in a complete vertical circle of radius 2.00 m by a light string that is fixed at one end. The ball moves so fast that the string is always taut and perpendicular to the velocity of the ball. As the ball swings from its lowest point to its highest point ANSWER: Correct Conceptual Question 10.14 Part A https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 Both men do positive work, but Joel does 25% more work than Jerry. Both men do positive work, but Jerry does 50% more work than Joel. Both men do positive work, but Joel does 75% more work than Jerry. Both men do positive work, but Joel does 50% more work than Jerry. Neither of them does any work. the work done on it by gravity and the work done on it by the tension in the string are both equal to zero. the work done on it by gravity is +118 J and the work done on it by the tension in the string is -118 J. the work done on it by gravity is -118 J and the work done on it by the tension in the string is +118 J. the work done on it by gravity and the work done on it by the tension in the string are both equal to -118 J. the work done on it by gravity is -118 J and the work done on it by the tension in the string is zero.
3/1/24, 11:41 PM Quiz 5 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 5/6 A potential energy function for system 1 is given by . The potential energy function for system 2 is given by , where is a positive quantity. How does the force on system 1 relate to the force on system 2 at a given position? ANSWER: Correct Problem 9.18 Part A In the figure, a constant external force = 160 N is applied to a 20.0-kg box, which is on a rough horizontal surface. While the force pushes the box a distance of 8.00 m, the speed changes from 0.500 m/s to 2.60 m/s. The work done by friction during this process is closest to ANSWER: Correct The force on the second system will be with less than the force on the first system. The force is identical on the two systems. The force on the second system will be with greater than the force on the first system. The force on the two systems will be in opposite directions. There is no relationship between the forces on the two systems. +1170 J. -1040 J. +1110 J. +1040 J. -1170 J.
3/1/24, 11:41 PM Quiz 5 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 6/6 Conceptual Question 9.08 Part A Which of the graphs in the figure illustrates Hooke's Law? ANSWER: Correct Score Summary: Your score on this assignment is 89.2%. You received 8.92 out of a possible total of 10 points. Graph a Graph b Graph c Graph d
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