Question

A planet revolving in an elliptical orbit has:

1. a constant velocity of revolution.
2. has the least velocity when it is nearest to the sun.
3. its areal velocity is directly proportional to its velocity.
4. areal velocity is inversely proportional to its velocity.
5. to follow a trajectory such that the areal velocity is constant.

Choose the correct answer from the options given below:

Options

• A only

• E only

• D only

• C only

Answer 1

E only

Explanation:

When a planet revolves around the sun, its areal velocity is constant, according to Kepler's rule.

`(dA)/(dt)` = constant