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Unformatted text preview: lbs 2 Sketch  FBD Substitute into U 12 equation? EX7.2 50lb Slider What is your first step? Solution: Problem Type: Find: Given: W=50 lbs, v 1 =2 ft/s, k =0.5, x=4 in, diagram V 2 : Velocity when spring is compressed to x Has displacement, springs and velocity, probably should us WorkEnergy Write out the WorkEnergy Relationship ft x x 33 . 3 12 4 3 = + = ( 29 lbs N N F y 25 60 cos 50 = =  = ( 29 ( 29 lbs ft U dx x x U = + += . 20 9 100 12 1 33 . 3 60 sin 50 25 * 5 . 2 1 4 2 2 1 T 1 = 0.5 mv 1 2 = 0.5*[50/32.2] 2 2 =3.10 ft lbs v 2 =5.46 ft/sec...
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This note was uploaded on 01/22/2011 for the course ME 212 taught by Professor Staff during the Spring '05 term at Cal Poly.
 Spring '05
 staff

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