Question 166: Gravitation

Question

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The escape velocities of planet A and B are same. But A and B are of unequal mass.
Reason R : The product of their mass and radius must be same. M
1
R
1
= M
2
R
2
In the light of the above statements, choose the most appropriate answer from the options given below :

Accepted Answer

$${v_e}$$ = escape velocity
$${v_e} = \sqrt {{{2GM} \over R}} $$
so for same $${v_e},{{{M_1}} \over {{R_1}}} = {{{M_2}} \over {{R_2}}}$$
A is true but R is false

Answer

Both A and R are correct and R is the correct explanation of A

Answer

Both A and R are correct but R is NOT the correct explanation of A

Answer

A is correct but R is not correct

Answer

A is not correct but R is correct

Gravitation

Choose the correct answer: