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Midterm 1 Solutions

# Midterm 1 Solutions - ME 343 1309 Midterm#1 This Exam is...

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Unformatted text preview: ME 343 1309 Midterm #1 10/5/2009 This Exam is closed book and closed notes. A one page (8.5” X 11”) ONE SIDED note sheet is allowed. You are encouraged to show all of your work in an effort to maximize partial credit potential. All problems may be solved either graphically of analytically. Remember vector answers need. both magnitude and direction. —Good Luckl Problem 1 (15 Points) Given the package moving device seen in ﬁgure 1, construct a kinematic diagram and compute the mobility, DOF, for the mechanism. Problem 2 Part A (10 Points) Given the engine cylinder seen in ﬁgure 2, construct a kinematic diagram and calculate the mobility. Figure 2: Engine cylinder Part B (10 Points) Assume the original crank angle is 30°; determine the linear displacement of the piston as the crank is rotated 60° Counterclockwrse. Eiaﬁfi «9:3 ﬂigcitggeiiiaimi e / iii WWMWM il #EEWM um i f? if x11 32‘ i E fé 11\$ hi i an» a i n a if” ‘H Ewiiﬁif'ri. am} ‘” in Problem 3 (10 Points) Given the truck in figure 3, determine the length of the ramp, L, that would be required to maintain an angle, B=30°, t0 the ground. Assume the height of the truck bed, h: 60”. Figure 3: Truck bed Given vectors A and B seen in figure 4, compute the resultant, R, Preblem 4 (15 Points) of: R=A+B. Figure 4: Vectors A and B Problem 5 (20 Points) Given the embossing mechanism seen in ﬁgure 5, determine the linear displacement of the stamp as the handle is rotated 150 clockwise. Problem 6 (20 Points) Given the rock crushing mechanism seen in ﬁgure 6, determine the angular displacement 0f the crushing ram when the crank is rotated 150 Clockwise. f) ‘5 AME} 3% tweet-é ”55:55:34“ e“ wﬁﬁge‘eﬁi} 5,55%: 53\$ ‘5“? 5L5®ﬁ> W 55%“ 55533 g“. . , , ea“ eitiée T; we 5‘} he ‘ “teem ._.::t 5* ...
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