1
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

The radius of a planet is twice the radius of the earth. Both have almost equal average mass densities. If '$$V_P$$' and '$$V_E$$' are escape velocities of the planet and the earth respectively, then

A
$$\mathrm{V}_{\mathrm{E}}=1.5 \mathrm{~V}_{\mathrm{P}}$$
B
$$\mathrm{V}_{\mathrm{P}}=1.5 \mathrm{~V}_{\mathrm{E}}$$
C
$$\mathrm{V_P=2 V_E}$$
D
$$\mathrm{V_E=3 V_P}$$
2
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two satellites of same mass are launched in circular orbits at heights '$$R$$' and '$$2 R$$' above the surface of the earth. The ratio of their kinetic energies is ($$R=$$ radius of the earth)

A
$$1: 3$$
B
$$3: 2$$
C
$$4: 9$$
D
$$9: 4$$
3
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

At a height 'R' above the earth's surface the gravitational acceleration is (R = radius of earth, g = acceleration due to gravity on earth's surface)

A
g
B
$$\frac{\mathrm{g}}{8}$$
C
$$\frac{g}{4}$$
D
$$\frac{g}{2}$$
4
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

The mass of a planet is six times that of the earth. The radius of the planet is twice that of the earth. If the escape velocity from the earth is '$$V_e$$', then the escape velocity from the planet is

A
$$\sqrt{3} \mathrm{~V}_{\mathrm{e}}$$
B
$$\sqrt{2} \mathrm{~V}_{\mathrm{e}}$$
C
$$\mathrm{V}_{\mathrm{e}}$$
D
$$\sqrt{5} \mathrm{~V}_{\mathrm{e}}$$
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