An L shape rod is attached at one point to a pivot.The rod sits on a frictionles

Question

An L shape rod is attached at one point to a pivot.The rod sits on a frictionless table and the diagram is a view from above. This means that gravity can be ignored for this problem. There are three forces that are applied to the rod at different points and angles: F1, F2,and F3.A) If F 3 =0 and F 1 =12N what does the magnitude of F2 have to be for there to be rotational equilibrium? B) If the L-shaped rod has a moment of inertia I=9kgm^2, F 1 =12N F1=12, F2 =27N and again F3 =0, how long a time t would it take for the object to move through 45 deg. ( ?/4 radians)?C) Now consider the situation in which F 1 =12N and F 2 =0 but now a force with nonzero magnitude F 3 is acting on the rod. What does F3 have to be to obtain equilibrium?

Explanation / Answer

B) ? = 12N*3cm - 27N*8cm = -180 N

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