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AP Physics C: Mechanics
5.5 Rotational Equilibrium and Newton’s First Law in Rotational Form
5.3 Torque
IntermediateMCQConceptual22.1k
A uniform beam held horizontally by a pivot and a cable.
A uniform beam held horizontally by a pivot and a cable.
A uniform rigid beam of length \(L\) and weight \(W\) is attached to a vertical wall by a frictionless pivot at its left end and held in a horizontal orientation. A support cable is attached to the beam at a distance \(\dfrac{L}{4}\) from the pivot and connects to the wall at an angle \(\theta\) above the beam. A sensor measures the vertical force exerted by the pivot on the beam and records a value directed downward. Which of the following provides the correct physical explanation for this observation?

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