The weight of a falling chain, revisited

Abstract

A vertically hanging chain is released from rest and falls due to gravity on a scale pan. We discuss the various experimental and theoretical aspects of this classic problem. Careful time-resolved force measurements allow us to determine the differences between the idealized and its implementation in the laboratory problem. We observe that, in spite of the upward force exerted by the pan on the chain, the free end at the top falls faster than a freely falling body. Because a real chain exhibits a finite minimum radius of curvature, the contact at the bottom results in a tensional force which pulls the falling part downward.

References in corpus (3)

• Falling chains
• The motion of the freely falling chain tip
• The falling chain of Hopkins, Tait, Steele and Cayley

Cited by in corpus (11)

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• Impact-induced acceleration by obstacles
• Understanding how a falling ball chain can be speeded up by impact onto a surface
• Understanding and enhancing the impact-induced tension of a falling chain
• A simple dynamical model of a freely-falling train of rigid segments