Q. A 70 kg man walks out on a 20kg beam that rests on, but is not attached to two supports. When the beam just starts to tip, what is the force exerted on the beam by the right support?
Q. An object with a mass of 5.10 kg is attached to the free end of the lightstring wrapped around a reel radius R=0.25 m and mass 3kg the reel is a solid disk, free to rotate in a vertical plane about the horizontal axis paasing through its center the suspended object is released from rest 6 m above the floor. determine A) the tension in the string,b) the acceleration of the object,c)the speed with which the object hits the floor.