Test1b-S07

Test1b-S07 - C The truck slows at a constant rate and...

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AEM 264-002/003 Dynamics – Test #1 Spring 2007 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 from a height of 1000 feet at an angle of 20 degrees below the horizontal as shown. The launch velocity is 50 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 and travels at a constant speed of 62 ft/s from point A to point B along a curve of radius r C =300 ft. The truck remains on the highway and has a speed of 70 ft/sec at point
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Unformatted text preview: C. The truck slows at a constant rate 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 car to travel from A to B? • What is the velocity of the truck at point D? • 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 left of 1.2 m/s. Mass B has a constant acceleration of 0.4 m/s 2 down. • What are the velocities of the blocks after 3 seconds? • How far has block B traveled from t=0s to t=3s? A B X Y 45° r C =300ft C D θ =-20 degrees 1000ft v A B...
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