Wolfram Demonstrations Project

A ball of mass

hangs at

from a rope of negligible weight extending between two posts; the tensions

and

in both parts of the rope are calculated.

The conditions of static equilibrium for forces are

and

. In this case, this means

and

, where

and

are the angles between the rope and the horizontal line joining the ends of the rope,

and

are the tensions between the ends of the rope and the ball, and

is the weight of the ball.

Contributed by: Enrique Zeleny

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Tension of a Rope with a Hanging Mass