1Slide Number 1234MEEN 221 Lecture 18 Concepts behind Shear Forces and Bending Moments DiagramsReference: Hibbeler 14thEd [Chapter 7] Q8: Find the shear force (SF) and bending moment (BM) at x = 5 ft and 15 ft. And find the maximum (absolute value) SF and BM and their locations. @ x = 5ft V = 1800 lb, M = 9000 lbft @ x = 15ft V = ‐950 lb, M = 7875 lbft Vmax = 2200 lb @ x = 20 ft Mmax = 9680 lbft @ x = 11.2 ft FBD 10 pt V digram 15 pt M digram 25 pt Results 30 pt 5p pt each Attendance 20 pt@ x = 15 ft find the value of V. Then 9680 ‐ .5*(5‐1.2)*V will give the BM value there. Q9: The coefficient of static friction between the crate and the inclined floor is 0.4. Determine the maximum and minimum force required to keep the 250 lb. crate at equilibrium. Also find the reason for the impending motion. Show all possible cases. You were asked for only Minimum. Multiply the r ubrics points by 5 So total is 60 point + 40 point for attendance
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