Just to add to what Yuqing has said, it is evident that to describe angular motion, one has to describe the plane in which the rotation occurs at a given time. Once it was seen that the perpendicular axis of rotation can be used to assign a unique direction to the angular motion, it was then a completely arbitrary choice as to which of the two possible directions to assign to the rotational motion. It was decided that the convention would be to assign the direction of the angular velocity vector according to the right hand rule.fterh said:Simple question: Is there a reason behind the right hand grip rule, or is it just like that (inexplicable)? How do we know that for an object with counter-clockwise rotation (e.g. on the table), the angular velocity is upwards?
The right hand grip rule is a method used to determine the direction of rotation in a rotating body. It states that if the fingers of the right hand are curled in the direction of rotation, then the thumb points in the direction of the angular velocity vector.
The right hand grip rule is important because it allows us to easily determine the direction of rotation in a system without having to use complex calculations. It is a helpful tool in visualizing the motion of rotating objects and understanding the relationship between angular velocity and direction of rotation.
To apply the right hand grip rule, simply hold your right hand with your fingers pointing in the direction of rotation. Then, curl your fingers in the direction of rotation and your thumb will point in the direction of the angular velocity vector.
Yes, there are variations of the right hand grip rule depending on the specific rotational system being studied. For example, in a right-handed screw, the direction of rotation is determined by the direction in which the screw moves when it is turned in the direction of the screw's threads.
Yes, the right hand grip rule can be applied to all rotational systems as long as the direction of rotation is known. It is a universal rule that is used in various fields of science and engineering, such as mechanics, physics, and astronomy.