ME 242 Test Review 2.23

ME 242 Test Review 2.23 - A magicians trick involves...

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2/24/09 1 Test Review Travis Fields Feb 23, 2009 The figure below shows two planes, A and B, which are flying at the same altitude. If their speeds are v A = 600 km/h and v B = 500 km/h. Given that is θ = 70°, determine the velocity of plane A with respect to plane B.
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2/24/09 2 Equation(s): b 1 2 Does this make sense? b 1 b 2 The figure below shows a crane. The polar coordinates of point A of the crane are given as functions of time by r = 12+0.4t 2 ft and θ = 0.02t 3 rad. Determine the acceleration of A in terms of polar coordinates.
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2/24/09 3 b 1 b 2 Solu-on: Does it make sense?
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Unformatted text preview: A magicians trick involves pulling a tablecloth out from under a set table. Cup starts from rest, at t=0 the cloth is Jerked away at 15 m/s. Assume coefficient of static and dynamic friction equal to 0.6. The cups acceleration is 6.51 to the right. Is this correct? 2/24/09 4 FBD = IRD Does the direction make sense? Relative Velocities Coordinate Transformation Array/ Reference Frames Knowing which coordinate system to use Look for clues (i.e. if Rc is given chances are path is the way to go)...
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ME 242 Test Review 2.23 - A magicians trick involves...

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