1
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
$$9: 4$$
2
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
$$\frac{g}{2}$$
3
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
$$\sqrt{5} \mathrm{~V}_{\mathrm{e}}$$
4
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

For a body of mass '$$m$$', the acceleration due to gravity at a distance '$$R$$' from the surface of the earth is $$\left(\frac{g}{4}\right)$$. Its value at a distance $$\left(\frac{R}{2}\right)$$ from the surface of the earth is ( $$R=$$ radius of the earth, $$g=$$ acceleration due to gravity)

A
$$\left(\frac{g}{8}\right)$$
B
$$\left(\frac{9 g}{4}\right)$$
C
$$\left(\frac{4 g}{9}\right)$$
D
$$\left(\frac{\mathrm{g}}{2}\right)$$
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