A rod of uniform mass density and total mass $$\(M\)$$ with a mass $$\(m\)$$ attached to one end is pivoted as shown. What is the tension force $$\(F_{T}\)$$ needed to prevent the rod from moving?
A.
\(F_{T}=2 m g\)
B.
\(F_{T}=\frac{1}{2} m g-\frac{1}{4} M g\)
C.
\(F_{T}=2 m g+\frac{1}{4} M g\)
D.
\(F_{T}=\frac{1}{4} M g-2 m g\)
E.
\(F_{T}=2 m g-\frac{1}{6} M g\)
Exam No：AP Physics C Practice Test Year：2024 Question No：27
Answer:
B
Knowledge points:
5.1 Torque and Rotational Statics
Solution:
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