A 60-lb uniform thin panel is placed in a truck with end A resting on a rough horizontal surface and end B supported by a smooth vertical surface .

A 60-lb uniform thin panel is placed in a truck with end A resting on a rough horizontal surface and end B supported by a smooth vertical surface . knowing that the deceleration of a truck is 12 ft/s**2 . determine (a) the reaction at end A and B , (b) the minimum required cofficient of static friction at end A