<p>OK. I need someone to please give me a very good walkthrough and explanation

Question

<p>OK. I need someone to please give me a very good walkthrough and explanation (how, why, etc.) on each of the steps.<br /><br />You'll get a Lifesaver rating if you provide a great explanation.<br /><br />A uniform rod, with a mass of 3.7 kg and a length of 1.2 m, is attached to a wall by a hinge at its base. A horizontal wire bolted to the wall 0.51 m above the base of the rod holds the rod at an angle of 25^o above the horizontal. The wire is attached to the top of the rod. Find the tension in the wire.</p>
<p>The answer is 39 N.</p>

Explanation / Answer

given that    m= 3.7kg L = 1.2m the vertical distance above the base rod r = 0.51m a) for the system in equlibrium the net torque is zero        T * 0.51m -( mg)L/2 cos250 = 0             0.51m T = ( mg)L/2 cos250                     T = 3.9m

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