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I know that D is the correct answer. Can someone please work it out?
3. A uniform beam of mass M is attached to a wall by a pivot at one end and is held up at angle θ with the horizontal by a horizontal cable attached to the other end of the beam and the wall, as shown. If the beam is held at rest, the tension in the cable can be expressed as (A) ⅓MgCOTO f y Mg ng
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L6m0 2. about o, ド1 LA) 2.

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