final exam f06

# final exam f06 - Name Section No Oklahoma State University...

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Name ________________________________ Section No. _____ Oklahoma State University Engineering Science 2123 Elementary Dynamics Spring 2006 – Final Exam 1. (10 points) A pitcher in a softball game releases the ball from a height of 2 ft, and at an initial angle of 15 degrees. The ball reaches the batter, who is 50 feet away, at a height of 2.2 feet. Determine the speed of the ball when it was released by the pitcher.

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Name ________________________________ 2. (10 points) The motion of the particle P in the figure below is given by: )) cos( 2 ( 5 . 1 ) ( t t r + = π and t t = θ ) ( where time is in seconds, and the angle is measured in radians. Determine the velocity and acceleration vectors of the particle when t = 2 seconds.
3. (10 points) A 40-kg package is at rest on a 20 degree incline when a force P=3500 newtons is applied to it at the 30 degree angle shown. Determine the acceleration of the package. The coefficient of friction is 0.25.

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final exam f06 - Name Section No Oklahoma State University...

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