Recent content by kamil.borkowski

I am trying to describe a motion of a clay target in a spring-powered target thrower. You can involve some forces (f.ex. friction between target and friction tunnel of an arm), but this complicates case even more. The only constant I can assume is velocity when target leaves the arm (27m/s)...

Hi there! I have a problem to find an equation of r(t), which will help me to describe motion of blue dot. I have seen many cases where there is a linear motion and you can write φ=ωt , r=V0t, but here there is an acceleration. I think I can write φ=εt2/2, but what about r(t) ? I have tried...

Whoa! Thank You guys for so many responces! I made some calculations and it came out, that ω of the arm equals 63,5 [rad/s]. Angle, for which target will leave arm, equals about 60°. You think these are pretty real results? Considering Dave's graph, I think that's a good angle.

Well, maybe not full solution. The thing is I need to choose proper spring. I will do it from energy equation, just like You sugested. To do so, I need angular and linear velocity of clay target (which I have) and angular velocity of the arm. And that's the problem, how to calculate ω of the...

Yes, I know, but I have to calculate it somehow (ω of the arm), because I need it to equation of energy.

Yes, exactly! I'm using that equation: E=1/2*(m*V^2 + Iω^2 + Iω^2). I know V and ω of disc, but I don't know how to calculate ω of the arm.

r0 is a path, that disc has to travel, from it's initial position (V0=0), to the moment when it leaves the arm (V=27) Yes, it is a clay launcher/thrower. It is spring-powered. I was thinking about the energy calculations, but I thought that it would leave the aspect of WHEN the target leaves...

Hi! I need a help in desiging a target thrower. I can't find a force that is needed in order to throw a target with certain velocity. I assume that it's going to be a centrifugal force, but I can't find a connection with linear movement of target and rotation of an arm. Does anyone have an idea...