Recent content by gilboy64

I was thinking in the terms of a bullet fired at a wall. You could say that if the bullet has to cover a distants d to reach the wall, that after a certain time T the distance between the wall and the bullet is 1/2d. After another certain time T the distance will be halved again 1/4d, if we...

Could some one please explain the paradox written by Zeno, 'Achilles and the tortoise'? How can this be possable?

F_s = m \omega^2 r is the same as F_s = m v^2 / r, so if i know the Fs, I can find v. I know the force the spring is exerting on the lever, so using moments on the lever I can find the force acting vertically upwards on the ball bearing, right? So if I resolve this force so that it is now acting...

Its quite hard to explain without drawings, but basicly it is a lever that opens when the yo-yo is at a certain speed, there is a spring that stops it from opening until the speed is reached, and the force acting on the end of the lever (the ball bearing) is greater than the force exerted by the...

Hi, can anybody help?

Hi, I am trying to find the speed it takes to open a yo-yo clutch, against a spring, to its maximum, the problem I am stuck on is whether you have to use F cos 90 - θ to get the centripetal force or if you have to do this in reverse eg. Fc = F / cos 90 - θ. I ask this because if you start...