Answer to Question #223221 in Physics for yang

Question

1. To get up on the roof, a person (mass 80.0 kg) places a 6.00-m aluminum ladder (mass 20.0 kg) against the house on a concrete pad with the base of the ladder 4.00 m from the house. The ladder rests against a plastic rain gutter, which we can assume to be frictionless. The center of mass of the ladder is 6 m from the bottom. The person is standing 9 m from the bottom. What are the magnitudes of the forces on the ladder at the top and bottom?
2. When using a pencil eraser, you exert a vertical force of 8.00 N at a distance of 4.00 cm from the hardwood-eraser joint. The pencil is 8.00 mm in diameter and is held at an angle of 30.0° to the horizontal. (a) By how much does the wood flex perpendicular to its length? (b) How much is it compressed lengthwise?

Answer 1

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