Exam III - Practice Exam - Answers Only

Exam III - Practice Exam - Answers Only - Problem...

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Unformatted text preview: Problem 3-Practice Final Name ME 270 Fall 2008 A plane is being tracked as it flies with a constant velocity. The height, h=10km when the plane is directly above point 0. If the angle 0 is decreasing (i.e. moving CW) at the rate of 0.020 rad/s when 9=60°, then: Determine the radius, r (2points) Draw the cylindrical and rectangular coordinates on the plane at the instant shown (4 points) Determine the velocity of the plane (5points) ' Determine the radial velocity of the plane from the tracker. (4 points) POP”? Please indicate responses to the following in the answer space provided: A- T: [15‘H’m B. Cylindrical and rectangular axis Problem 5 Name ME 270 Fall 2008 Vehicle A is traveling at 100 ft/s and is decelerating at 5 ft/sz. Vehicle B is traveling at 30 ft/s and is accelerating at 3 ft/sz. A. Please determine the velocity of B relative to A for the coordinate system provided. B. Please determine the acceleration of vehicle A for the coordinate system provided. C. Please determine the acceleration of vehicle B for the coordinate system provided. D. Please determine the magnitude of the acceleration of B. E. , Please determine the acceleration of B relative to A for the coordinate system provided. Answer B: aA = "5;?— ilk/a Answer C: a3 = 82— + 3 AnswerD: IlaBl|= 4.1.42. ' 5“ ‘ AnswerE: aB/A= 8: {—35 Fr/s" Problem 7-Practice Final Name ME 270 Fall 2008 7a. Please state Newton’s Three Laws (6 points) 1St Law - 2nd Law 3rd Law 7b. A 2kg. block passes point B with a speed of 3.5 m/s. Calculate the magnitude of the nonnal force at B (5 points). Next calculate the maximum speed of the block at point B to maintain contact with the path. when VB = 3.5 m/s. 4- . 5 /WI / 5 to maintain contact. Problem 9-Practice Final Name ME 270 Fall 2008 The pin moves x—direction at a constant rate of 20 mm/s. Determine: a. The magnitude of the velocity v of the pin when x=60mm (5 points) ‘ b. Determine the x and y components of the velocity (5 points) 0. Determine the magnitude of the acceleration a when x=60 mm (5. points) .“l‘t‘l‘ullllWM“illlm‘l‘.‘»‘ll'M\lill‘l'uili\Ml‘u‘l‘ul'Iillllll‘l‘l‘t'nl'lml‘fi‘llllfillll‘m“Hm“? V PM“ l‘fl‘l‘n‘n‘ulllllfil' \ a. x ‘ VP: 20? Meg/st iVizlEIMS 5392. 5%M; lavi‘ 67M”? ...
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Exam III - Practice Exam - Answers Only - Problem...

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