Question

Gas escapes from the surface of a planet because it acquires an escape velocity. The escape velocity will depend on which of the following factors :

I. Mass of the planet

II. Mass of the particle escaping

III. Temperature of the planet

IV. Radius of the planet

Select the correct answer from the codes given below :

• A. I and II
• B. II and IV
• C. I and IV
• D. I, III and IV

Answer 1

Answer: (C)

I and IV

Answer 2

$v _ { e } = \sqrt { \frac { 2 G M } { R } }$ i.e. escape velocity depends upon the mass and radius of the planet.