What is the initial acceleration of end B in a suspended rod system?

[chadgidge]

A rod of length 61.0 cm and mass 2.10 kg is suspended by two strings which are 37.0 cm long, one at each end of the rod. The string on side B is cut. Find the magnitude of the initial acceleration of end B.

 

[Doc Al]

What have you done so far? Where did you get stuck?

Hint: Review Newton's 2nd law for rotation.