Table of Mechanics Demonstration List of Mechanics Equipment & Supplies Lecture Demonstrations

# Climbing Rope, 1J30.19

Topic and Concept:

Location:

Abstract:

A heavy climbing rope is hung from the ceiling, and someone can climb or hang from it.

 Equipment Location ID Number Climbing Rope ME, Bay B7, Shelf #1

Important Setup Notes:

• A long wood rod with a hook on the end is usually used to hang the rope to eliminate the need for a ladder. This may take practice.

Setup and Procedure:

1. Using the long wood rod, hang the rope from the U-bolt on the ceiling (only available in rooms 2103, 2223, and 2241).
2. Have someone, it could be the lecturer, hang from the rope or even climb up it a bit.
3. Discuss the tension in the rope and how it allows the climber to "defy" gravity.

Cautions, Warnings, or Safety Concerns:

• Climbing the rope to high heights is quite dangerous, especially for an inexperienced climber!

Discussion:

When a rope is taught, there is force along the rope that is constant. It acts to oppose further increases in tension which arises, fundamentally, from the net attractive force between the atoms making up the material when the material is deformed. The magnitude of this force is the sum of the magnitudes of the forces pulling on the string which act to deform the rope.

In this case, it is the weight of the climber that deforms the rope. The tension in the rope exactly balances the weight of the climber. Thus, the climber can use friction between his/her feet and hands and the rope when applying pulling/pushing forces on the rope to climb upward without worrying about gravity pulling them right back down to the floor(assuming he/she doesn't let go).

Videos:

References:

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