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Difficulty level:High-school physics. |

The two-Newton weight stretches each spring by four extra meters, making each spring five meters long in total. So the distance from A to D is five meters of spring plus one meter of rope plus five meters of spring, for a total of eleven meters.

Also note that the distance from A to C is six meters, and the distance from B to D is six meters. This is important because we are going to connect seven meters of rope from C to a point near A, and from B to a point near D. Since each rope is longer than the six meter distance, the rope hangs slackly. The new ropes are shown to the left (click image for larger view).

Now here is the question: What happens when you cut the one-meter rope from B
to C? This rope is helping hold up the weight, so the weight will fall. How
much lower will it be when it comes to rest?

Path: Eric's Site
/ Math
/ Spring and Rope Puzzle |
Related:
Dice,
Monty Hall,
Pi From Coin Flips,
Springs and Ropes
(Site Map) |

© Copyright 1996 by Eric Postpischil.