The uniform slender bar AB has a mass of 1.15 kg and is driven by crank OA and c

Question

The uniform slender bar AB has a mass of 1.15 kg and is driven by crank OA and constrained by link CB of negligible mass. If OA has an angular acceleration ?0 = 4.7 rad/s2 and an angular velocity ?0 = 3.7 rad/s when both OA and CB are normal to AB, calculate the force in CB for this instant. (Suggestion: Consider the use of Eq. 6/3 with A as a moment center.) The force FCBis positive if CB is in tension, negative if in compression.

Degelman Company uses a job order cost system and applies overhead to production on the basis of direct labor costs. On January 1, 2014, Job No. 50 was the only job in process. The costs incurred prior to January 1 on this job were as follows: direct materials $19,060, direct labor $11,170, and manufacturing overhead $16,280. As of January 1, Job No. 49 had been completed at a cost of $89,980 and was part of finished goods inventory. There was a $14,840 balance in the Raw Materials Inventory account. During the month of January, Degelman Company began production on Jobs 51 and 52, and completed Jobs 50 and 51. Jobs 49 and 50 were also sold on account during the month for $121,100 and $157,900, respectively. The following additional events occurred during the month.

Explanation / Answer

considering moment about A =0.

mg*0.3 = T*0.6

T = mg/2 = 5.635 N

Tension in the rod, hence positive. The other forces due to OA was not considered because they will have zero momentum about A, as they pass through A.

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