Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Gravitation

Question:

A planet moves around the sun. At a point P it is closest from the sun at a distance d1 and has a velocity V1. AT another point Q, when it is farthest from the sun at a distance d2 its speed will be

Options:

$\frac{d_1^2 V_1}{d_2^2}$

$\frac{d_2 V_1}{d_1}$

$\frac{d_1 V_1}{d_2}$

$\frac{d_2^2 V_1}{d_1^2}$

Correct Answer:

$\frac{d_1 V_1}{d_2}$

Explanation:

Angular momentum is conserved

∴  mv1 d1 = mv1 d2

v2 = $\frac{v_1 d_1}{d_2}$