Recent content by Puzzler24

Thanks Jack! Using your formulas I come up with the following: Td=0.5 * 113kg * 12.5m/s * 12.5m/s = 8828 Newtons (Kinetic Energy) Mw=(113 kg * 12.5m/s * 12.5m/s) / (9.8 m/s/s * 3m)=600kg h = 3m/8 = .375m Based on my experimental device 600kg seems like too much. Did I get the math...

Hi there I'm building a zipline and want to create a simple braking system that will progressively slow a 250lb person (me) from a top speed of about 30mph to zero in about 10' The braking system is as shown in the attachment. I'm a long time out of college, so although I recall the...