A long thin uniform rod lies motionless in a friction freehorizontal plane along the y-axis. It is pinned to the ground witha friction free pivot. A force F is applied at 90 degrees to thebar and at its very end. If the mass is 1kg and the force is 10N:
a) what is the initial acceleration of the center mass?
b) what force does the pin apply to the rod iniitially?
c) where could this same force be applied so that the pinexerts no force initially?