At the instant shown, the rod Ris rotating about its centre of rotation with ω=3.3rad/s.

mA=11.7kg;

The pulley, with mP=11.6kg and RP=0.2m, may be modelled as a uniform disc.

The rod, with mR=6.8kg and L=0.8m, may be modelled as a thin beam rotating about one end.
g=9.8m/s ².
a)What is the magnitude of the acceleration of point B at this instant?

Question

At the instant shown, the rod Ris rotating about its centre of rotation with ω=3.3rad/s.

mA=11.7kg;

The pulley, with mP=11.6kg and RP=0.2m, may be modelled as a uniform disc.

The rod, with mR=6.8kg and L=0.8m, may be modelled as a thin beam rotating about one end.
g=9.8m/s ².
a)What is the magnitude of the acceleration of point B at this instant?

anonymous · Answer

Here is diagram:

irishboy123 · Answer

|dw:1446382739643:dw|

that's your FBD.  do you agree?  

i've done a Euler Lagrange so we can compare answers when you are done....

use the velocity/acceleration of the box as you reference coordinate and convert the angular motion of the pulley and rod accordingly.