The bar BC is pin connected to the 45 kg disk that rests on the surface for whic

Question

The bar BC is pin connected to the 45 kg disk that rests on the surface for which
coefficient of static friction is 0.42. 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.
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 static friction is 0.6, 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 is 0.42. 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. Find value of largest moment M that can be applied to BC without causing motion. Now, if the applied moment is M = 345 Nm and coefficient of static friction is 0.6, is there motion of the disk? Justify your answer.

Explanation / Answer

Maximium moment can be applied=0.42*9.81*45=185.4090 N-m.

if the co-efficient of friction = 0.6

maximum moment that can be applied = 0.6*9.81*45=264.47 N-m.

Given the moment =345 N.m so there will be motion .

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