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For the same slender bar as the previous two problems, assume [tex]\alpha = 5.4 \, \text{rad/sec}^2[/tex] clockwise (not its true value), and determine the vertical pin reaction at point A.

A. 28.1 N
B. 98.1 N
C. 17.1 N
D. 179.1 N

Answer :

Final answer:

The determination of the vertical pin reaction at point A for a rotating slender bar requires information about the bar's properties and position of point A, which was not provided. Additional data are needed to solve the problem correctly.

Explanation:

To determine the vertical pin reaction at point A for a slender bar with a given clockwise angular acceleration (α=5.4 rad/sec²), we need to apply Newton's second law for rotational systems. The equation of motion for such a rotating system is Στ = Iα, where Στ is the net torque, I is the moment of inertia, and α is the angular acceleration. However, to solve this question, we need additional information such as the length of the bar, its mass, and the position of the point A in relation to the bar's center of mass.

Since we are not provided with enough information to solve the problem, there might be missing data from a previous part of a multi-step problem. We can conclude that the vertical pin reaction at point A could be calculated if we knew the full context and figures relevant to the problem.

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