4. A 10 kg mass is attached to a 1 111 long beam of mass 5 kg. A rope tie to the end of the beam is able to hold the beam against the wall with a tension of 150 N. . [Answer in 2 signicant gures] a) Draw the rigid body diagram of the beam. Indicate the pivot point. 1)) Determine how far along the beam should the hanging mass place (d) to keep the system in equilibrium?J (3) Determine the contact force at point P (both horizontal and vertical)