3 ms·
"Cheetahs accomplish this with leg and back muscles that make up half its body weight. These contract at such high speeds that each kilogram of muscle generates
by kumarvvr 8y ago
"Cheetahs accomplish this with leg and back muscles that make up half its body weight. These contract at such high speeds that each kilogram of muscle generates 100 watts of power. For comparison, greyhounds produce just 60 watts with the same amount of muscle, horses manage just 30 watts, and Usain Bolt can produce just 25. With these powerful muscles, a cheetah can speed up or slow down by up to 9 mph in a single stride. The cat is like a sports car that always runs on second gear."
This is astounding. 100 W per kilogram of muscle. Average cheetah weight is around 50 kg (From their Wikipedia page). Considering their muscle weight is around 25 kG, their power consumption is around 2500 Watts.This seems very efficient to me, considering they can sustain lower speeds for longter time if required.
Nature is crazy efficient.
- akiselev 8y agoIt sounds like their power output is 100 watts per kilogram - it doesn't say anything about how much energy they had to consume to provide that. It's unlikely that they are as efficient at high speeds as they are at lower speeds.
- NegativeLatency 8y agoEfficient where it has to be. Plants only convert between 3 and 6 percent of solar energy. https://en.m.wikipedia.org/wiki/Photosynthetic_efficiency https://en.m.wikipedia.org/wiki/Photosynthetic_efficiency
- Animats 8y agoCheetahs get about 90% elastic recovery from each stride; humans max out around 70%. Most robots, 0%, which has been a long-standing legged mobile robot problem. It's one reason those hydraulic Boston Dynamics machines needed way too much power.