Recent content by Buckethat_fisherlad

So what you described is the same as what I drew in the following figure? If so then I totally understand that the force ##G## can't contribute to any movement, as long as ##G## is perpendicular to the roof of the car. (I know there should be two normal forces acting from the ground that adds...

Alright, I'm seeing the bigger picture now. Thanks! I did not take acount for this. I see that now.

Then what is correct? Is the force G infinite as previously discussed or just a VERY big force? It just feels absurd that the force has to be infinite to stop the wheel from rotating...

Maybe I'm just yapping at this point. Sorry! I'm pretty sure you can apply the centripetal force to the system. Sure, omega is kind of misleading but I'm very sure that the velocity of the wheel is tangential along the rim. So F = mv^(2)/R. And if I continue we would get G = 2mv^(2)/R. Is it...

In this scenario, the rod has to stop the centripetal force that the two F's contribute to. Then we get, G = 2mw^(2)*R (where m is the mass of the wheel) G in this case is not zero, and the angle between the rod and the radius is constant (180 degrees). So shouldn't this principle also apply to...

I can do a variant of the problem, We have the wheel spinning when the two forces F is applied to the wheel (shown in figure). Now we have a rod that is attached to the right wall and stops the wheel from spinning. Due to Newton's third law, the force G that the rod applies to the wheel should...

You're saying the only case where the force G (which is always horizontal) can be finite is when the force [G] is at instances where the angle between G and the radius is non-zero/non-180-degree? Mathematically, I get it, but if I would do the experiment at home, I wouldn't need an infinite big...

The force G becomes; G = 2F/sin(180-15), which is a very big force

Alright, that is missleading. I tried to say "the wheel/disc rotates around it's center" but I wanted it to be clear that the body can't leave its place. It (can) spin freely (in the air or around its axis) but the force G stops it from spinning.

Here's a free body diagram of the problem. I had trouble uploading the image before...

Also, ignore friction and other typical forces that can stop the wheel on its own

TL;DR Summary: A force which stops a wheel/disc from rotating Hi! I made a problem myself inspired by a typical mechanics problem, where you have two equal forces acting on each end of a wheel/disc and a third one that is suppose to stop the wheel/dic from rotating. So let me get into the...