A uniform plank rests on a level surface as shown below. The plank has a mass of 34 kg and is 6.0 m long. How much mass can be placed at its right end before it tips? (Hint: When the plank is about to tip over, it makes contact with the surface only along its edge at 4.2 m that becomes a momentary axis of rotation.) -4.2 m- 1.8 m Things to consider: 1. At the instant that the plank tips over, where does the normal force from the surface to the plank act? 2. Draw all forces on the plank at the instant of tipping.

A uniform plank rests on a level surface as shown below. The plank has a mass of 34 kg and is 6.0 m long. How much mass can be placed at its right end before it tips? (Hint: When the plank is about to tip over, it makes contact with the surface only along its edge at 4.2 m that becomes a momentary axis of rotation.) -4.2 m- 1.8 m Things to consider: 1. At the instant that the plank tips over, where does the normal force from the surface to the plank act? 2. Draw all forces on the plank at the instant of tipping.

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section: Chapter Questions

Problem 90A

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