15. Rotational Equilibrium
Beam / Shelf Against a Wall
Multiple Choice
Multiple ChoiceA beam 200 kg in mass and 4 m in length is held against a vertical wall by a hinge on the wall and a light horizontal cable, as shown. The beam makes 53° with the wall. At the end of the beam, a second light cable holds a 100 kg object. Calculate the angle that the Net Force of the hinge makes with the horizontal (use +/– for above/below +x axis, and use g=10 m/s2.)
A
θ = −48°
B
θ = −37°
C
θ = +37°
D
θ = +48°
306
3
17:9m
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