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- Homework Statement
- A uniform stick of mass M and length L is suspended horizontally with

end B on the edge of a table, while end A is held by hand. Point A is suddenly released. Right after release, find the vertical force at B, as well as the downward

acceleration of point A. You should find a result greater than g. Explain how this can be possible,

given that gravity is the only downward external force in the problem.

- Relevant Equations
- Question 6.14 from Kleppner and Kolenkow.

τ = dL/dt

A solution was provided:

We take torques about point B. Note that τ = MgL/2 = Iα so α = (3g)/2L. Everything from here is straightforward.

I don't understand why in this step, you can take torque about B without accounting for a fictitious force due to the acceleration of the Rod.

Thanks for any help.

We take torques about point B. Note that τ = MgL/2 = Iα so α = (3g)/2L. Everything from here is straightforward.

I don't understand why in this step, you can take torque about B without accounting for a fictitious force due to the acceleration of the Rod.

Thanks for any help.