Hi all, Suppose we go in space where no gravity and friction exists. If there is a bar, in say - horizontal plane and we apply a force at one end of the bar, in this plane and perpendicular to the bar. Will that bar rotate and translate or it will only undergo pure translational motion without rotation? In other words is it sufficient to apply a single force and cause a body to rotate? Or do we need to apply a couple/moment to make the body rotate.