# A planet revolving in elliptical orbit has:

Question:

A planet revolving in elliptical orbit has:

A. a constant velocity of revolution.

B. has the least velocity when it is nearest to the sun.

C. its areal velocity is directly proportional to its velocity.

D. areal velocity is inversely proportional to its velocity.

E. to follow a trajectory such that the areal velocity is constant. Choose the

correct answer from the options given below:

1. (1) A only

2. (2) E only

3. (3) D only

4. (4) C only

Correct Option: , 2

Solution:

(2)

$\frac{\mathrm{d} \overrightarrow{\mathrm{A}}}{\mathrm{dt}}=\frac{\overrightarrow{\mathrm{L}}}{2 \mathrm{~m}}$