Is there any change in the angular velocity of the earth when a body strikes the earth's surface from outside ?

Is there any change in the angular velocity of the earth when a body s

1.	Is there any change in the angular velocity of the earth when a body strikes the earth's surface from outside ?
Answer» Solution :We know that angular momentum of a body = momentum of inertia of that body `xx` angular VELOCITY of the body. The velocity of any body coming from outside and striking the surface of the earth is usually directed TOWARDS the CENTRE of the earth. For this reason, the body possesses no angular momentum with respect to the axis of rotation of the earth. As a result, the angular momentum of the earth remains CONSERVED. But due to the inclusion of the body, the mass of the earth increases and consequently, the moment of inertia of the earth also increases. For this reason, the angular velocity of the earth decreases slightly. But actually the mass of such a foreign body is so SMALL that there is no appreciable change in either the moment of inertia or the angular velocity of the earth.