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  4. A planet of mass m is revolving round the sun (of mass .Ms) in an elliptical orbit. If vecv is the velocity of the planet when its position vector from the sun is vec r , if the planet rotates in counter clockwise direction, then areal velocity has a direction :

Q. A planet of mass is revolving round the sun (of mass in an elliptical orbit. If is the velocity of the planet when its position vector from the sun is , if the planet rotates in counter clockwise direction, then areal velocity has a direction :

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Solution:

Areal velocity is considered as an angular vector of which direction is given in the plane normal to the plane of revolution/rotation and given by right hand thumb rule.

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