3 ms·
>The ideal consumption necessary to raise this 7 kg dumbbell by 1 meter in 1 second is 7 watts. You sure? A HP is 75 Kg raised by 1 meter in 1 second (and is
by jaclaz 5y ago
>The ideal consumption necessary to raise this 7 kg dumbbell by 1 meter in 1 second is 7 watts.
You sure?
A HP is 75 Kg raised by 1 meter in 1 second (and is roughhy 750 W):
https://en.wikipedia.org/wiki/Horsepower https://en.wikipedia.org/wiki/Horsepower
Raising 1/10th of the weight by same distance in the same time should be 1/10th of that i.e. 70-75 W.
- amelius 5y agoenergy = force times distance force = 7kg times 10N/kg = 70N (roughly) So yes, more like 70W
- jaclaz 5y agoGood, so if we take for good the mentioned 20% efficiency of human muscles[1], the robotic arm wins largely, as 70W/0.2=350 W vs. the declared 200 W of the robotic arm. (I still doubt that the robotic arm can be almost twice as efficient as a human arm, however, so probably the 20% is not accurate or there is some other factor involved) . [1] which I have no idea if correct even roughly
- progbits 5y agoYeah it is wrong. 68W ideal, assuming pure conversion to potential energy with no loss: https://www.wolframalpha.com/input/?i=7kg*1m*%289.8m%2Fs%5E2%29+%2F+1s+in+watt https://www.wolframalpha.com/input/?i=7kg*1m*%289.8m%2Fs%5E2...