1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-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:
A
$2 R$
B
$(2 \sqrt{2}-1) R$
C
$\sqrt{2} R$
D
$2 \sqrt{2} R$
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-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:
A
$\frac{11 v}{3}$
B
$\frac{33 v}{8}$
C
$\frac{8 v}{33}$
D
$\frac{3 v}{11}$
3
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The acceleration due to gravity at pole and equator can be related as

A
$$g_e=g_p < g$$
B
$$g_e=g_p=g$$
C
$$g_e < g_p$$
D
$$g_e > g_p$$
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A satellite is revolving around the earth in a circular orbit with kinetic energy of $$1.69 \times 10^{10} \mathrm{~J}$$. The additional kinetic energy required for just escaping into the outer space is

A
$$3.38 \times 10^{10} \mathrm{~J}$$
B
$$1.69 \times 10^{10} \mathrm{~J}$$
C
$$0.89 \times 10^{10} \mathrm{~J}$$
D
$$1.35 \times 10^{10} \mathrm{~J}$$
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