A ladder witht the length of 10m rest against a frictionless wall. The combined
ID: 2187701 • Letter: A
Question
A ladder witht the length of 10m rest against a frictionless wall. The combined weight of the ladder and an individual can be idealized as 800N force applied at point B, as shown. What is the horizontal frictional force between the ladder and floor if the angle at point C is 70?.
A ladder witht the length of 10m rest against a frictionless wall. The combined weight of the ladder and an individual can be idealized as 800N force applied at point B, as shown. What is the horizontal frictional force between the ladder and floor if the angle at point C is 70?.Explanation / Answer
Yes, Draw the FBD, you will get: (N_{wall} = f_{floor}) (N_{wall}) is the normal reaction provided by the vertical frictionless wall. Taking torques about the base point: (N_{wall}10sin70 = 800(7 csc70)cos 70) You get (N_{wall}) which is your force of friction!
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