Gravitation-Kepler's Laws of Planetary Motion (NEET Physics): Questions 6 - 7 of 7

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Question number: 6

» 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.

G(M1+M2)d

b.

G(M1M2)d

c.

2G(M1+M2)d

d.

4G(M1+M2)d

Question number: 7

» Gravitation » Kepler's Laws of Planetary Motion

MCQ▾

Question

The semi-major axes of the orbits of mercury and mars are respectively 0.387 and 1.524 in astronomical unit. If the period of Mercury is 0.241 year, what is the period of Mars?

Choices

Choice (4) Response
a.

3.9 years

b.

1.9 years

c.

1.2 years

d.

3.2 years

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