(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Force F is applied to a rod resting on a frictionless surface. What is the acceleration at B?

2. Relevant equations

The length of the rod is L. Its mass is m.

I_{center}= mL^{2}/12

3. The attempt at a solution

The rod is supposed to spin about its center of mass. The acceleration at B is the same as that at A in polar coordinate center at the center of mass.

τ = (L/2) F = I_{center}α => α = 6F/mL

a = (L/2) α = 3F/me_{θ}

where <b>e_{θ}</b> is a unit vector in the counter-clockwise tangent direction relative to the center of rotation.

Is this correct? Where did the centripetal force go?

There is no centripetal force because there is no actual rotation at the moment (ω=0 rad/s).

- Thanks

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# Homework Help: Levers physics problem

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