william watts
Member
- Messages
- 114
- Location
- Central valley, calif.
I am so out of shape I can hardly lift a sheet of plywood anymore, so I'm headed back to the gym, with a personnel trainer this time. He directs me to different excerise machines, tells me the number of reps, amount of weight and gives encouragement, what a guy. We got into a discussion on how much weight is actually being lifted when the lifting cable passes over several pulleys and makes a convoluted path to the weight. He and his training buddies are counting the number of pullys, the amount of weight, the length of cable and who knows what all to make that calculation. I explained to him I seem to recall the MA can be determined by the ratio of the length the pulling cable moves to the length the weight is lifted. It makes no difference the number of pullys, the cable path, none of the complicated stuff they came up with. I also said I would ask someone who would know for sure. Anybody?
Bill
Bill