Physics 1 Problem Solutions 123

# Physics 1 Problem Solutions 123 - Chapt 13 Equilibrium and...

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Chapt. 13 Equilibrium and Elasticity 119 Full-Answer Problems 013 qfull 00100 1 3 0 easy math: horizontal balanced beam 1. A horizontal beam is balanced on a point pivot at x pivot = 0 . 200 m. The beam is uniform with mass 0 . 1 kg and the center of mass is at x beam cm = 0 . 500 m. There is also a single object of mass 2 kg on the beam. Where is it? 013 qfull 00200 2 3 0 moderate math: equilibrium ladder 2. A ladder leans against a wall in static equilibrium. Ladder, wall, and ground are perfectly rigid. The ladder has mass m ladder , length ladder , and center of located at cm along its length measuring from its base. The angle between the ladder and the VERTICAL is θ . HINT: Draw a good diagram marking on all possible forces: gravity, the normal forces of the ground and wall, and the friction forces of the ground and wall. Draw the ladder leaning to the right so that we are all consistent. a) Write out the equations of equilibrium including all possible forces. Just so we are all on
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