00:01
Hello, so we have an athlete.
00:03
I'm sorry for my too bad drawing, apologize in advance, because i'm not a great artist.
00:12
Um, so that's like this hand is here.
00:28
We are told that the center of mass is, um, his body length is two meters, and the center of mass is here, 75, so his weight is 75 times gravity.
00:51
The hands are at a distance of 0 .3 meters from his head.
01:30
The center of mass is at a distance of 1 .2 meters from his feet.
01:40
And so this distance here must be 0 .5 meters.
01:48
So there is normal reaction from his feet and from his hands.
01:58
We are to calculate the value of that normal reaction.
02:04
That normal reaction would be equal to the force exited by his hand on the ground.
02:08
So reaction from hand, rh, reaction from feet, rf.
02:14
So we take moments.
02:17
First of all, we take moments about the feet if we want to know the false exited by the hand or the normal reaction of the hand.
02:28
So standing at the feet, we are the feet.
02:39
We take moments...