일반물리학 1 — Equilibrium and Elasticity: Problem 39

39 In Fig. 12-42, a cable of negligible mass suspends one end of a horizontal beam of weight 750 N and length 3.00 m. The beam’s other end is hinged to a wall. The cable’s tension is 800 N. (a) What is distance D between the hinge and the cable’s attachment point on the wall? (b) If D were more, would the cable tension be more, less, or the same?