-1 m-x 1 m 2 m- In the diagram on the right, a plank weighing 120 N is supported by two trestles at points A and B. A man weighing 480 N is standing on the plank. centre of mass of plane a Redraw the diagram, showing all the forces acting on the plank. b Calculate the total clockwise moment of the two weights about A. A c Use the principle of moments to calculate the upward force from the trestle at B. weight of man weight of plank = 480 N = 120 N d What is the total downward force on the trestles? e What is the upward force from the trestle at A? f The man now walks past A towards the left-hand end of the plank. What is the upward force from the trestle at B at the instant the plank starts to tip? How far is the man from A as the plank tips? n Testing the principle of moments on the opposite page, moments were taken about X. Calculate th ut point Y Are the sums of the clockwise and anticlockwise moments still equal?

-1 m-x 1 m 2 m- In the diagram on the right, a plank weighing 120 N is supported by two trestles at points A and B. A man weighing 480 N is standing on the plank. centre of mass of plane a Redraw the diagram, showing all the forces acting on the plank. b Calculate the total clockwise moment of the two weights about A. A c Use the principle of moments to calculate the upward force from the trestle at B. weight of man weight of plank = 480 N = 120 N d What is the total downward force on the trestles? e What is the upward force from the trestle at A? f The man now walks past A towards the left-hand end of the plank. What is the upward force from the trestle at B at the instant the plank starts to tip? How far is the man from A as the plank tips? n Testing the principle of moments on the opposite page, moments were taken about X. Calculate th ut point Y Are the sums of the clockwise and anticlockwise moments still equal?

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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