Gravitation-Orbital Velocity of a Satellite (NEET Physics): Questions 5 - 7 of 8

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Question number: 5

» Gravitation » Orbital Velocity of a Satellite

Assertion-Reason▾

Assertion (Ꭺ)

The speed of revolution of an artificial satellite revolving very near the earth is 8 kms -1.

Reason (Ꭱ)

Orbital velocity of a satellite, become independent of height of near satellite.

Choices

Choice (4) Response
a. Ꭺ is true but Ꭱ is false
b. Both Ꭺ and Ꭱ are false
c. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
d. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 6

» 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 1.35π105kmhr . The angular velocity of S 2 as actually observed by an astronaut in S 1 is –

Choices

Choice (4) Response
a.

π2.55radhr

b.

π3radhr

c.

π6.10radhr

d.

2π7radhr

Question number: 7

» Gravitation » Orbital Velocity of a Satellite

MCQ▾

Question

The speed with which the earth have to rotate on its axis so that a person on the equator would weigh (35) the as much as present will be - (Take the equatorial radius as 6400 km. )

Choices

Choice (4) Response
a.

7.28 ⨯ 10 -3 rad/sec

b.

3 28 ⨯ 10 -3 rad/sec

c.

3 28 ⨯ 10 -4 rad/sec

d.

7.83 ⨯ 10 -4 rad/sec

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