- #1
vkash
- 318
- 1
In rotational mechanics i am mostly confused with the axis of rotation. Let me give you some examples of question.
OK this may seem to be solved here but what about this question.
IAOR(instantaneous axis of rotation). I can;t find that.
However when i see solution of this example they take torque around the center of the rod and solve it. Why they take center of the rod. Why not any other point. If any other point on the plane is taken then answer may vary.
this point is really confusing me in rotational dynamics. which axis should i choose when i do questions.
please help me.!
I think general physics is correct place for this question.
about which axis. Is that instantaneous axis of rotation.A rod of length l falls on two pads of same height from height h(rod is initially horizontal to plane when it is at height h). The coefficient of restitution of the metal pads are e1 and e2(e1 > e2). The angular velocity of the rod after it recoils is__________
OK this may seem to be solved here but what about this question.
Now once again. which axis should i choose.A uniform rod of mass length l is held stationary in vertical position on a smooth horizontal surface.Find angular acceleration of the rod in this position when horizontal force F=mg is applied at it's topmost point.
IAOR(instantaneous axis of rotation). I can;t find that.
However when i see solution of this example they take torque around the center of the rod and solve it. Why they take center of the rod. Why not any other point. If any other point on the plane is taken then answer may vary.
this point is really confusing me in rotational dynamics. which axis should i choose when i do questions.
please help me.!
I think general physics is correct place for this question.