Quiz 5

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Arizona State University *

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Aerospace Engineering

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Apr 3, 2024

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pdf

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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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