Quiz2_solutions

# Quiz2_solutions - Physics 2 Summer Session 2008 Quiz 2...

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Physics 2 – Summer Session 2008 Quiz # 2 Solutions Question 1 A uniform massive beam is suspended horizontally as shown in the figure. It is attached to the wall by a small hinge and a wire. The force that the hinge exerts on the beam has components (a) upward and to the right (b) downward and to the right (c) upward and to the left (d) downward and to the left The tension of the wire, as applied to the beam, has a component to the right. Since there is equilibrium, the force exerted by the hinge must have a component that balances it, therefore it must have a component to the leftt . Next, let’s consider torques around the Center-of-Mass. The torque due to the weight is zero. The torque due to the tension tends to cause anti-clockwise rotation. To balance that the torque due to the force exerted by the hinge must tend to cause clockwise rotation, ie, must have a downward component. Æ

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Quiz2_solutions - Physics 2 Summer Session 2008 Quiz 2...

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