I find infographics like this useful because I frequently use ropes, pulleys, and winches at my cabin to perform tasks like removing tree stumps, pulling docks out of the water, and helping folks whose cars are stuck in the mud.įigure 2 shows a free body diagram of the rigging and my derivation of the angles and forces involved. This idealization would be better if the carabiner was replaced with a pulley. The derivation assumes that there is no friction associated with the carabiner, which is not true. In this post, I will show how to derive a couple of formulas for the various angles and forces shown in Figure 1. Figure 1 is a graphic that nicely illustrates the tension between two ropes connected to an anchor point by a carabiner. One common high-school physics problem involves computing the tension in ropes tied to an anchor by a pulley. As part of this tutoring, I have been looking for good graphics that illustrate basic science concepts.
I have been tutoring math and physics at the local library for the last few months.
Figure 1: Great Rope Tension Infographic.
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