A 10-foot ladder weighing 40 pounds is leaning against a wall as shown. Since Th

Question

A 10-foot ladder weighing 40 pounds is leaning against a wall as shown. Since The ladder is uniform its center of mass is at its center. The ladder is in equilibrium. Find the force of the wall pushing against the top of the ladder.

12. A 10-foot ladder weighing 40 pounds is leaning against a wall as shown. Since The ladder is uniform its center of mass is at its center. The ladder is in equilibrium. Find the force of the wall pushing against the top of the ladder. 1) 20 pounds 2) 10 pounds (3) 30 pounds 4) 40 pounds 5) None of these. 45°

Explanation / Answer

Let the force is F

writing torque equation about bottom

40*(0.5*l)*cos(45)-F*L*cos(45)=0

F=20 pound

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