3. A 200-lb man walks up an inclined plank of negligible weight which makes an angle of 70° with the wall. The coefficient of static friction between the floor and the ladder is 0.3 and that between the ladder and the wall is 0.2. When the man is at a horizontal distance X from the foot of the plank, the plank would begin to slide. (a) Draw a complete FBD of the system. Find (b) the frictional force on the floor, (b) the frictional force on the wall and (c) the horizontal distance X.

3. A 200-lb man walks up an inclined plank of negligible weight which makes an angle of 70° with the wall. The coefficient of static friction between the floor and the ladder is 0.3 and that between the ladder and the wall is 0.2. When the man is at a horizontal distance X from the foot of the plank, the plank would begin to slide. (a) Draw a complete FBD of the system. Find (b) the frictional force on the floor, (b) the frictional force on the wall and (c) the horizontal distance X.

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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Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

3. A 200-lb man walks up an inclined plank of negligible weight which makes an
angle of 70° with the wall. The coefficient of static friction between the floor and
the ladder is 0.3 and that between the ladder and the wall is 0.2. When the man is
at a horizontal distance X from the foot of the plank, the plank would begin to
slide. (a) Draw a complete FBD of the system. Find (b) the frictional force on the
floor, (b) the frictional force on the wall and (c) the horizontal distance X.

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