- #1

- 6

- 0

## Main Question or Discussion Point

I know that when I apply a Force on the center of gravity of a body, I generate a linear motion and no rotation around any axe. (supposing here there is no drag)

Now when I apply the same force off COG, I get a torque T = F.d making the body rotate

AND a linear velocity, which is strictly the same that I get when applying the force on the COG.

So in the second case, it seems that the system has MORE energy (translational + rotational) than in the first case (translational) for the same amount of applied force.

Can someone explain me this apparent violation of energy conservation ?

Now when I apply the same force off COG, I get a torque T = F.d making the body rotate

AND a linear velocity, which is strictly the same that I get when applying the force on the COG.

So in the second case, it seems that the system has MORE energy (translational + rotational) than in the first case (translational) for the same amount of applied force.

Can someone explain me this apparent violation of energy conservation ?