091910physhw

091910physhw - (1) AB 19. During the interval t = 8.0...

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David Kim Physics Period 9 9/19/10 HW #2 Pg. 28-29 #11-24 11. Which car has the greatest acceleration during the time interval 10.seconds to 15 seconds? Car D 12. Which car travels the greatest distance during the time interval 0 second to 10.seconds? (1) A only 13. Starting from rest, an object rolls freely down a 10.-meter long incline in 2.0 seconds. The acceleration of the object is (2) 5.0 m/s 14. A car accelerates uniformly from rest at 3.2 meters per second 2 . Determine the speed of the car when it has traveled a distance of 40 meters. D = .5at 2 40.m = (1.6m/s 2 )(x 2 ) 25s 2 = x 2 x = 5s V = at V = (1.6m/s 2 )(5s) V = 8 m/s 15.Determine the acceleration of the object during the time interval t = 3.0 seconds to t = 5.0 seconds. 7.5 m/s 16. Determine the average speed of the object during the time interval t = 6.0 seconds to t = 8.0 seconds. -7.5 m/s 17. Determine the total distance traveled by the object during the first 3.0 seconds.
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25 m 18. During which interval is the object’s acceleration the greatest?
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Unformatted text preview: (1) AB 19. During the interval t = 8.0 seconds to t = 10.0 seconds, the speed of the object is (3) decreasing 20. What is the maximum speed attained by the object during the 10.0 seconds of travel? 25 m/s 21. The graph below represents the relationship between distance and time of travel for an object moving in a straight line. Determine the instantaneous speed of the object at 1.5 seconds. 2.5m / 1.5s = 1.7 m/s 22. A boat heads directly eastward across a river at 12 meters per second. If the current in the river is flowing at 5.0 meters per second due south, what is the magnitude of the boats resultant velocity? (2) 13 m/s 23. Which par of graphs represents the same motion? (3) 24. The graph below represents the motion of a body moving along a straight line. Which quantity related to the motion of the body is constant? (3) acceleration...
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This note was uploaded on 12/19/2010 for the course BIO 0081 taught by Professor Haowu during the Spring '10 term at CUNY York.

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091910physhw - (1) AB 19. During the interval t = 8.0...

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