Recent content by gen x

Why is force frame dependent? If acceleration is the same, and m is the same then why F is not equal? ..F=ma

vl(t) =ω⋅l vl(t)=v

I thought maybe " r" of local curvature in specific point. Doesn’t the centripetal force have to be the same in both reference frames?

math: Cf=m x 0^2 /r = 0 Yes that is good question. point t1 has centripetal force to the right toward center for frame fixed to center of wheel, but for ground frame centripetal force has different direction.

In answer are some parts that you(members in my thread) claim are wrong. I will qoute them: "To make the point of rotation the center of mass then there must be zero net force. Any rigid body with a pure torque applied (force couple) is going to rotate, and since the center of mass is not...

So answer from John Alexiou is not correct? https://physics.stackexchange.com/questions/700754/will-the-bar-rotate-about-the-center-of-mass-or-not From ground frame velocity at bottom part of car wheel is zero, that mean centripetal force is zero.. Here must exist centripetal force, why ground...

How can I move object from postion 2 in position 1, with pure rotation if I don't use center of this circle?

There is only one center for this rotation that is substitution for rotatio+translation?

If I choose one point as center then everything else rotate around that center Do you suggest any video lecture about my topic?

If we choose center as B, B is now fixed and everything rotate around B, so how CoM still move in stright line in this anylize?

Because Dale said that B will not move in straight line, so everything what moves in curve need centripetal

At start of video tennis racket is spinning. Do you agree that racket is rotate around axle that pass through CoM? I see only this, racket is not rotate around man head( "rotate around any point you want").

But these forces are internal, how can we mix internal and external forces when anylize system? Internal forces can't move or rotate object, you can't move car if you push with hands on windshield, because this force cancle at seat.

I don't understand. How you get centripetal force in B, if no force act on ruler after the strike?

My assumption is that the desk is frictionless. Frame fixed to the table: After the strike, the center of mass (CoM) of the ruler will move in a straight line because the net force is zero. If the CoM were to move along a curved trajectory, a centripetal force would be required, but since no...