What is the weight of the beam?

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To determine the weight of the beam, apply the principle of the lever, which states that the moments around the pivot must balance. A force of 300N is applied to hold the beam horizontally, indicating that the beam is in equilibrium. Key considerations include identifying the forces acting on the beam and their points of application, as well as calculating the torque they exert about the pivot point. Since the beam is in equilibrium, the net torque must equal zero. This analysis will lead to the calculation of the beam's weight.
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Homework Statement


A long uniform beam is pivoted at one end. A force of 300N is applied to hold the beam horizontally.
http://img182.imageshack.us/img182/4219/11062008vt2.png
What is the weight of the beam?

Homework Equations


Don't know which question to use... need help!


The Attempt at a Solution

 
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Ask yourself:
(1) What forces act on the beam? Where do they act?
(2) What torque do they exert about the pivot point?
(3) Since the beam is in equilibrium, what must be the net torque?
 
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