Quiz 2

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3/1/24, 11:38 PM Quiz 2 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 1/6 Quiz 2 Due: 11:59pm on Tuesday, January 23, 2024 You will receive no credit for items you complete after the assignment is due. Grading Policy Problem 2.21 Part A A ball rolls across a ﬂoor with an acceleration of 0.100 m/s 2 in a direction opposite to its velocity. The ball has a velocity of 4.00 m/s after rolling a distance 6.00 m across the ﬂoor. What was the initial speed of the ball? ANSWER: Correct Problem 2.36 Part A Two identical stones are dropped from rest and feel no air resistance as they fall. Stone is dropped from height , and stone is dropped from height 2 . If stone takes time t to reach the ground, stone will take time ANSWER: 3.85 m/s 4.60 m/s 4.15 m/s 5.85 m/s 5.21 m/s

3/1/24, 11:38 PM Quiz 2 2/6 Correct Problem 2.14 Part A The velocity of an object is given by the expression v(t) = 3.00 m/s + (3.00 m/s 3 ) t 2 , where t is in seconds. Determine the position of the object as a function of time if it is located at x = 1.00 m at time t = 0.000 s. ANSWER: Correct Problem 2.25 Part A https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 /2. . 2 t. t/ . 4 t. x(t) = 1.00 m x(t) = (3.00 m/s) t x(t) = 1.00 m + (3.00 m/s) t + (1.00 m/s 3 ) t 3 x(t) = (3.00 m/s) t + (1.00 m/s 3 ) t 3 x(t) = (3.00 m/s) t + 1.00 m

3/1/24, 11:38 PM Quiz 2 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 3/6 A package is dropped from a helicopter moving upward at 15 m/s. If it takes 23 s before the package strikes the ground, how high above the ground was the package when it was released if air resistance is negligible? ANSWER: Correct Problem 4.21 Part A A plane ﬂying at 70.0 m/s suddenly stalls. If the acceleration during the stall is 9.8 m/s 2 directly downward, the stall lasts 5.0 s, and the plane was originally climbing at 25° to the horizontal, what is the velocity after the stall? ANSWER: Correct Problem 4.24 Part A 2200 m 1760 m 1320 m 2640 m 80 m/s at 37° below the horizontal 80 m/s at 37° above the horizontal 66 m/s at 17° above the horizontal 66 m/s at 17° below the horizontal

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3/1/24, 11:38 PM Quiz 2 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 4/6 A plane has an eastward heading at a speed of 156 m/s (relative to the air). A 20.0 m/s wind is blowing southward while the plane is ﬂying. The velocity of the plane relative to the ground is ANSWER: Correct Problem 4.02 Part A An object has a position given by , where quantities are in SI units. What is the speed of the object at time = 2.00 ? ANSWER: Correct Problem 4.03 157 m/s at an angle 7.36° south of east. 157 m/s at an angle 7.31° east of south. 157 m/s at an angle 7.31° south of east. 155 m/s at an angle 7.36° east of south. 155 m/s at an angle 7.36° south of east. 19.8 m/s 13.2 m/s 23.1 m/s 9.90 m/s 16.5 m/s

3/1/24, 11:38 PM Quiz 2 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 5/6 Part A An object has a position given by , where all quantities are in SI units. What is the magnitude of the acceleration of the object at time = 2.00 s? ANSWER: Correct Problem 4.07 Part A A hockey puck slides off the edge of a table with an initial velocity of 27.9 m/s and experiences no air resistance. The height of the tabletop above the ground is 2.00 m. What is the angle below the horizontal of the velocity of the puck just before it hits the ground? ANSWER: Correct Problem 4.34 8.00 m/s 2 9.60 m/s 2 6.40 m/s 2 4.00 m/s 2 0.00 m/s 2 31.8° 77.2° 72.6° 12.7° 22.8°

3/1/24, 11:38 PM Quiz 2 https://session.masteringphysics.com/myct/assignmentPrintView?assignmentID= 0 6/6 Part A An aircraft performs a maneuver called an "aileron roll." During this maneuver, the plane turns like a screw as it maintains a straight ﬂight path, which sets the wings in circular motion. If it takes it 27 s to complete the circle and the wingspan of the plane is 14.9 m, what is the acceleration of the wing tip? ANSWER: Correct Score Summary: Your score on this assignment is 97.5%. You received 9.75 out of a possible total of 10 points. 2.5 m/s 2 0.40 m/s 2 6.0 m/s 2 0.17 m/s 2

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