College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Question 3
Transcribed Image Text:Question 3.
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 an dleans 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 frictional 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 (i.e. Normal force plus
frictional foce).
(a)
Frictionless
wall
53.1°
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