NEET 2024 | Gravitation Question 6 | Physics

The minimum energy required to launch a satellite of mass $$m$$ from the surface of earth of mass $$M$$ and radius $$R$$ in a circular orbit at an altitude of $$2 R$$ from the surface of the earth is:

$$\frac{5 G m M}{6 R}$$

$$\frac{2 G m M}{3 R}$$

$$\frac{G m M}{2 R}$$

$$\frac{G m M}{3 R}$$

NEET 2023 Manipur

MCQ (Single Correct Answer)

-1

The escape velocity of a body on the earth surface is $$11.2 \mathrm{~km} / \mathrm{s}$$. If the same body is projected upward with velocity $$22.4 \mathrm{~km} / \mathrm{s}$$, the velocity of this body at infinite distance from the centre of the earth will be:

$$11.2 \sqrt{2} \mathrm{~km} / \mathrm{s}$$

Zero

$$11.2 \mathrm{~km} / \mathrm{s}$$

$$11.2 \sqrt{3} \mathrm{~km} / \mathrm{s}$$

NEET 2023 Manipur

MCQ (Single Correct Answer)

-1

If $$\mathrm{R}$$ is the radius of the earth and $$\mathrm{g}$$ is the acceleration due to gravity on the earth surface. Then the mean density of the earth will be :

$$\frac{\pi \mathrm{RG}}{12 \mathrm{~g}}$$

$$\frac{3 \pi R}{4 g G}$$

$$\frac{3 g}{4 \pi R G}$$

$$\frac{4 \pi \mathrm{G}}{3 g R}$$

NEET 2023

MCQ (Single Correct Answer)

-1

Two bodies of mass $$m$$ and $$9 m$$ are placed at a distance $$R$$. The gravitational potential on the line joining the bodies where the gravitational field equals zero, will be ($$G=$$ gravitational constant) :

$$-\frac{12 G m}{R}$$

$$-\frac{16 G m}{R}$$

$$-\frac{20 G m}{R}$$

$$-\frac{8 G m}{R}$$

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