Rotational Dynamics About a Fixed Axis: a Very Thin Uniform

question 87

Multiple Choice

Rotational dynamics about a fixed axis: A very thin uniform rod, 2.40 m long and of weight 135 N, has a frictionless hinge at its lower end. It starts out vertically from rest and falls, pivoting about the hinge. Just as it has rotated through an angle of 55.0°, what is the downward acceleration of the end farthest from the hinge?

• A) 5.02 m/s²
• B) 8.03 m/s²
• C) 9.80 m/s²
• D) 12.0 m/s²
• E) 19.6 m/s²

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