A 30-kg uniform ladder 12 m long is leaning against a frictionless wall at an angle of 50 degrees above the horizontal.A 45-kg boy climbs 5.0 m up the ladder.What is the magnitude of the force exerted by the ladder on the wall?
A)200 N
B)110 N
C)280 N
D)140 N
E)550 N

Question

Quizplus · Accepted Answer

The force exerted by the ladder on the wall is calculated using the equilibrium of torques and forces. Considering the ladder's weight, the boy's weight, and the geometry, the horizontal force exerted by the ladder on the wall is approximately 280 N.

A 30-Kg Uniform Ladder 12 M Long Is Leaning Against