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• February 16, 2022

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• PHY101 Physics I © Dr.Cem Özdoğan

• 1-5 Lengths

• PROBLEM: The world’s largest ball of string is about 2 m in radius. To the nearest order of magnitude, what is the total length, L, of the string of the ball?
• SETUP: Assume that the ball is a sphere of radius 2 m. In order to get a simple estimate, assume that the cross section of the string is a square with a side edge of 4 mm. This overestimate will account for the loosely packed string with air gaps.
• CALCULATE: The total volume of the string is roughly the volume of the sphere. Therefore,