1. A hawser (a thick docking rope) thrown from a ship to a pier is wrapped two full urns around a bollard. The tension in the hawser is 7500 N; by exerting a force of 150 N 150 N on its free end, a dockworker can just keep the hawser from slipping. (a) Determine the coefficient of friction between the hawser and the bollard. (b) Determine the tension in the hawser that could be resisted by the 150-N force if the hawser were wrapped three full turns around the bollard.

International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
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Chapter7: Dry Friction
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1. A hawser (a thick docking rope) thrown from a ship to a pier is wrapped two full
turns around a bollard. The tension in the hawser is 7500 N; by exerting a force of
150 N
150 N on its free end, a dockworker can just keep the hawser from slipping. (a)
7500 N
Determine the coefficient of friction between the hawser and the bollard. (b)
Determine the tension in the hawser that could be resisted by the 150-N force if
the hawser were wrapped three full turns around the bollard.
Transcribed Image Text:1. A hawser (a thick docking rope) thrown from a ship to a pier is wrapped two full turns around a bollard. The tension in the hawser is 7500 N; by exerting a force of 150 N 150 N on its free end, a dockworker can just keep the hawser from slipping. (a) 7500 N Determine the coefficient of friction between the hawser and the bollard. (b) Determine the tension in the hawser that could be resisted by the 150-N force if the hawser were wrapped three full turns around the bollard.
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