If I keep a rotating disc along the x-y plane and apply a force along the same plane in line with the disc's centre of mass, assuming no friction and no gravity, will the disc move along the direction of the force or in some other direction?
closed as unclear what you're asking by sammy gerbil, Gert, user36790, Wolpertinger, Neuneck Aug 19 '16 at 10:06
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The disk rotates only in the direction of applied force, not in any other direction. You can answer this with very basic concepts of physics like conservation of momentum, energy, etc. But, if the friction is taken into consideration, two cases arise.
Case 1): The applied force is due to a field:
Even in this case, the answer is same.
Case 2) : The applied force is mechanical:
This case includes examples like pushing the disk with a stick, pulling it, etc.
In this case, due to the friction, the disk moves in other direction. (Daily life experience)