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The angular velocity vector of Earth's rotation points from the south pole towards the north pole. It represents the axis around which the Earth rotates, with a direction perpendicular to the plane of the equator. This vector is oriented in the same direction as the Earth's rotational axis.
The two kinds of acceleration are linear acceleration, which involves changes in an object's speed along a straight line, and angular acceleration, which involves changes in an object's rotational speed around an axis.
You can increase the angular velocity of a rotating object by applying a torque to it. This can be done by exerting a force at a distance from the object's axis of rotation, causing it to spin faster.
Mercury, just as Earth rotates alone its axis. The spin is from left to right along this axis with one rotation lasting nearly 176-days on Earth. Needless to say it is a very slow spin in comparison.
The offset along a fault is the distance by which one side of the fault has moved in relation to the other side. This movement can be horizontal, vertical, or a combination of both, and it is a measure of the displacement that has taken place along the fault.