The bar BC is pin connected to the 45 kg disk that rests on the surface for whic
ID: 1863074 • Letter: T
Question
The bar BC is pin connected to the 45 kg disk that rests on the surface for which coefficient of static friction 0.42 s ? = . You need to determine the largest moment M that can be applied to bar BC without causing motion of the disk.
a) Draw Free Body Diagrams of disk and bar BC. Label direction of friction force.
b) Find value of largest moment M that can be applied to BC without causing motion.
c) Now, if the applied moment is M = 345 Nm and coefficient of friction is 0.6 s ? = , is there motion of the disk? Justify your answer.
The bar BC is pin connected to the 45 kg disk that rests on the surface for which coefficient of static friction 0.42 s ? = . You need to determine the largest moment M that can be applied to bar BC without causing motion of the disk. Draw Free Body Diagrams of disk and bar BC. Label direction of friction force. Find value of largest moment M that can be applied to BC without causing motion. B656Now, if the applied moment is M = 345 Nm and coefficient of friction is 0.6 s ? = , is there motion of the disk? Justify your answer.Explanation / Answer
Moment, M = F*sqrt(0.3^2 + 0.4^2) = 0.5F = F/2
F*(4/5) = 0.42*(45*9.8 + F*(3/5))
F = 231.525 + 0.315F
F = 338N
M = F/2 = 169 Nm
If u = 0.6
M = 345
F = 690N
690*4/5 O 0.6*(45*9.8 + 690*(3/5))
552 O 513
Hence LHS is more that means disk moves
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