12.E. A uniform beam of length L = 10.0m rests as seen below. The pivot point is located d = 6.0m from the ground and the beam makes an angle of = 30 to the ground. If a person applies a force F on the left end, perpendicular to the beam, then what is the minimum value for this force to get the beam to just start to rotate? ANS: 21 HELP: The mass of the beam is not needed. When the beam just starts to rotate the normal contact force of the beam on the floor will be zero. FA? P 6.0m 30 W