A uniform beam of mass is hinged to a wall at its left end and held horizontal by a…
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A uniform 4.0m beam of mass 30kg is hinged to a wall at its left end and held horizontal by a light cable. The cable is attached to the beam 3.0m from the hinge and is anchored to the ceiling directly above the hinge, making a 40∘ angle above the beam. A 400N crate hangs from the right end of the beam. Neglect the mass of the cable. Which of the following is closest to the magnitude of the tension in the cable?
(a) 9.5×102N
(b) 8.3×102N
(c) 1.1×103N
(d) 1.4×103N