Sir Lancelot, who weighs 800 N, is assaulting a castle by climbing auniform ladder that is 5.0 m long and weighs 180 N . Thebottom of the ladder rests on a ledge and leans across the moat in equilibriumagainst a frictionless, vertical castle wall. The ladder makesan angle of 53.1° with the horizontal. Lancelot pauses one-third of theway up the ladder. (a) Find the normal and friction forces on the base ofthe ladder. (b) Find the minimum coefficient of static friction needed toprevent slipping at the base. (c) Find the magnitude and direction of thecontact force on the base of the ladder.

Sir Lancelot, who weighs 800 N, is assaulting a castle by climbing auniform ladder that is 5.0 m long and weighs 180 N . Thebottom of the ladder rests on a ledge and leans across the moat in equilibriumagainst a frictionless, vertical castle wall. The ladder makesan angle of 53.1° with the horizontal. Lancelot pauses one-third of theway up the ladder. (a) Find the normal and friction forces on the base ofthe ladder. (b) Find the minimum coefficient of static friction needed toprevent slipping at the base. (c) Find the magnitude and direction of thecontact force on the base of the ladder.

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Question

Sir Lancelot, who weighs 800 N, is assaulting a castle by climbing a
uniform ladder that is 5.0 m long and weighs 180 N . The
bottom of the ladder rests on a ledge and leans across the moat in equilibrium
against a frictionless, vertical castle wall. The ladder makes
an angle of 53.1° with the horizontal. Lancelot pauses one-third of the
way up the ladder. (a) Find the normal and friction forces on the base of
the ladder. (b) Find the minimum coefficient of static friction needed to
prevent slipping at the base. (c) Find the magnitude and direction of the
contact force on the base of the ladder.

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