star61
August 6, 2009, 6:37pm
107
I think the three of you have miss-interpreted me. Ofcourse, even a six year old knows that gravity pulls downwards. You must think I’m still in nursery school. But if there was no gravity, you would not be able to run at all. Peeps are being pedantic about my phrasing.
If you lean your biro pen over, it crashes down to one side, and the longer the pen, the faster the velocity of the other end of pen as it falls. And how does it fall? Downwards? No, it falls in an arch. There is no way in hell we can generate all the force for 12meters per second velocity on our own. Gravity can only pull down things that don’t have a base underneath them. IF you accelerate with a forwards lean, you are going to accelerate quicker because gravity rotates you forwards, and if you get the right posture and feeling, you actually feel like you are falling forwards quickly. My phrasing is a simplification.
“Rainy”, you are correct, but I still prefer my phrasing, because without gravity, you’d not be able to run forwards. There is a huge amount of momentum, that simply wouldn’t be so huge without gravity. I think we are both correct, but we are using different phrasing. Ofcourse when you stand still, there is no forwards pull from gravity, but as soon as you start to lean forwards, you do not have to apply any force to fall further forwards with the rotation. If you catch yourself so that you don’t fall down, you will fall forwards instead (running.) Ofcourse, we are applying force as we run, so that we don’t collapse.
You understanding of physics is lacking. We could generate just as much force on the moon as long as we can get traction. Flight time would be much longer, stride rate greatly reduced, but stride length greatly increased.
How this has any correlation to sprinting on earth, I’m not sure, but gravity is not our friend when running.