Question

Need help on E through I.

Static Equilibrium Exercise A 142 m long ladder that weighs 485 N is resting against a very slimy wet moss covered wall that can be considered to be frictionless, as shown in the figure hbelow. A fire fighter that weighs 795 N is 5.64 meters up the ladder 5.6 m 60.0 a . Identify and label all the forces acting on the ladder. o. Make a list of the x-components of the forces acting on the ladder. C Make a list of the y-components of the forces acting on the ladder. d Make a list of the torques acting on the ladder using the point of contact with the ground as the pivot point. e Use your list of forces to write two equations that express translational equilibrium for the ladder. Use your list of torques to write the equation that expresses rotational equilibrium for the ladder. list of torques to write the equation that expresses rotation 9 Use your three equations to find the normal force and the frictional force exerted by the ground on the ladder. (Answer: normal foree 1280 N: frictional force 322 N) h. If the ladder is just on the verge of slipping along the ground, what is the coefficient of static friction between the ladder and the ground? (Answer: 0.25) How far up the ladder is the center of mass of the ladder firefighter? (Answer: 6.19 m)

Answer 1