COMEDK 2025 Afternoon Shift | Gravitation Question 4 | Physics

Two spherical planets P and Q have the same uniform density $\rho$, and masses Mp and $\mathrm{MQ}_{\mathrm{Q}}$ and surface areas A and 4 A respectively. Another spherical planet $R$ also has the same uniform density $\rho$, and its mass is $\mathrm{Mp}+\mathrm{MQ}$. The escape velocities from these planets is

$V_R>V_Q>V_P$

$\mathrm{V}_{\mathrm{R}}<\mathrm{V}_{\mathrm{Q}}<\mathrm{V}_{\mathrm{P}}$

$V_R=V_Q>V_P$

$V_R>V_Q=V_P$

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

If the radius of earth were to shrink by two percent, its mass remaining the same, the acceleration due to gravity on the earth's surface would

Decrease by $4 \%$

Increase by $1 \%$

Increase by $4 \%$

Increase by $2 \%$

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

The radius of earth is $R$ and acceleration due to gravity on its surface is $g$. The height at which the acceleration due to gravity becomes $\frac{g}{8}$ is:

$2 R$

$(2 \sqrt{2}-1) R$

$\sqrt{2} R$

$2 \sqrt{2} R$

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

A planet is 121 times heavier than moon and has a diameter 9 times that of moon. If the escape velocity on the planet is $v$, then the escape velocity on the moon will be:

$\frac{11 v}{3}$

$\frac{33 v}{8}$

$\frac{8 v}{33}$

$\frac{3 v}{11}$

PREVIOUS NEXT

COMEDK Subjects