Any questions??

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Four-step plan:

Step 1 – FBD: Draw a free body diagram of the bar.

Step 2 – Kinetics: Write down the Newton/Euler equations for the sphere. Since there is no fixed point on the bar, choose the center of mass for your moment equation

Step 3 – Use the rigid body kinematics equation for relating the accelerations of points A and B on the bar:

a_B = a_A + α x r_B/A – ω² r_B/A 

followed by relating the acceleration of B to the acceleration of the bar’s center of mass, G:

a_G = a_B + α x r_G/B – ω² r_G/B 

Step 4 – Solve