Gravitation (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 32 - 35 of 84

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Question number: 32

» Gravitation » Escape Velocity

MCQ▾

Question

Acceleration due to gravity on a planet is 10 times the value on the earth. Escape velocity for the planet and the earth are V p and V e respectively. Assuming that the radii of the planet and the earth are the same, then –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 33

» Gravitation » Kepler's Laws of Planetary Motion

MCQ▾

Question

The mass and radius of earth and moon are M 1, R 1 and M 2, R 2 respectively. Their centers are d distance apart. With what velocity should a particle of mass m be projected from the mid-point of their centers so that it may escape out to infinity–

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 34

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

If the period of revolution of an artificial satellite just above the earth be T second and the density of earth be ρ, kg/m 3 then

(G = 6.67 ⨯ 10 -11 m 3 /kg. second 2)

Choices

Choice (4) Response

a.

Equation

b.

ρT 2 varies with time

c.

ρT 2 is a universal constant

d.

Both a. and c. are correct

Question number: 35

» Gravitation » Orbital Velocity of a Satellite

MCQ▾

Question

Two satellites S 1 and S 2 revolve round a planet in the same direction in circular orbits. Their periods of revolutions are 1 hour and 6 hour respectively. The radius of S 1 is 1.5 ⨯ 10 5 km and the radius of S 2 is 4.95 ⨯ 10 5 km. The velocity of S 2 with respect to S 1 is Equation . The angular velocity of S 2 as actually observed by an astronaut in S 1 is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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