NEETPhysics-Gravitation
NEET Physics Acceleration due to Gravity MCQ Question
Type: MCQ-numerical-Medium-Class 11
Two planets A and B of radii R and 1.5 R have densities ρ and ρ/2 respectively. The ratio of acceleration due to gravity at the surface of B to A is :
A
2 : 3
B
2 : 1
C
3 : 4
D
4 : 3
Correct Answer
Option A
Detailed Explanation
Using g = G(M/R²) and M = ρV, the ratio g_B/g_A = (ρ/2 * (4/3)π(1.5R)³) / (ρ * (4/3)πR³) = 2/3.
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