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Test1a-S07

Test1a-S07 - point B along a turn of radius r C =400 ft The...

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AEM 264-002/003 Dynamics – Test #1 Spring 2007 I agree that I will not discuss or describe this test with anyone else before Friday, 2/16/07. Signed:____________________________________ Instructions: Closed book, closed notes test, one 8½ inch by 11 inch sheet of handwritten formulas allowed, with no worked example problems. You must turn in your formula sheet with your test. 90 minute time limit – strictly enforced. Show all of your work . 1. A projectile is launched at an angle of 30 degrees from the horizontal from a height of 500 feet above sea level and lands in a crater that is 100 feet below sea level, as shown. The launch velocity is 65 mph. How long does it take the projectile to travel from A to B? What is the horizontal distance from A to B? What are the projectile’s velocity (vector) and speed (scalar) on impact at B? 2. A car leaves the highway at point A at a speed of 52 ft/s and the speed increases at a constant rate to
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Unformatted text preview: point B along a turn of radius r C =400 ft. The truck remains on the highway with a speed of 60 ft/s at point C. The truck accelerates at 2 ft/s 2 and reaches point D at the same time that the car reaches point B. Points B and D are at the same Y position. • How long does it take the truck to travel from C to D? • What is the velocity of the car at point B? • What is the velocity of the car at point B with respect to the truck at point D? • What is the acceleration of the car at point B with respect to the truck at point D? B A 3. Two masses A and B are arranged with pulleys as shown on the left. Mass A has an initial velocity (t=0s) to the right of 1.2 m/s. Mass B has a constant acceleration of 0.6 m/s 2 down. • What are the velocities of the blocks after 4 seconds? • How far has block B traveled from t=0s to t=4s? A B X Y r C =400ft C D θ =30 degrees 500ft 100ft v A B...
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