Gravitation Test

Result

Gravitation Test - 40

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Weekly Quiz Competition

Question 1
4 / -1

A satellite moves around the earth in a circular orbit of radius r with speed v, If mass of the satellite is M , its total energy is

A

B

C

D

Solution
Question 2
4 / -1

A satellite with K.E. E_k is revolving round the earth in a circular orbit. How much more K.E. should be given to it so that it may just escape into outerspace ?

A

B

C

D
Question 3
4 / -1

Potential energy of a satellite having mass m and rotating at a height of 6.4 x 10⁶ m fromthe surface of earth

A

B

C

D

Solution
Question 4
4 / -1

When a satellite going round the earth in a circular orbit of radius r and speed v loses some of its energy, then r and v changes as

A
r and v bothe will increase

B
r and v both will decrease

C
r will decrease and v will increase

D
r will increase and v will decrease

Solution
Question 5
4 / -1

The time period of a satellite of earth is 5 hours If the sepration between the earth and the satellite is increased to four times the previous value, the new time period will become ...... hours

A
10

B
120

C
40

D
80

Solution
Question 6
4 / -1

A person sitting in a chair in a satellite feels weightless because

A
The earth does not attract the objects in a satellite

B
The normal force by the chair on the person balances the earth’s attraction

C
The normal force is zero

D
The person in satellite is not accelerated

Solution
Question 7
4 / -1

Two satellites A and B go round a planet in circular orbits having radii 4R and R respectively If the speed of satellite A is 3v, then speed of satellite B is

A
3v/2

B
4v/2

C
6v

D
12v
Question 8
4 / -1

A satellite moves in a circle around the earth, the radius of this circular is equal to one half of the radius of the moon’s orbit the satellite completes one revolution in .........lunar month

A
1/2

B
2/3

C

D

Solution
Question 9
4 / -1

The additional K.E. to be provided to a satellite of mass m revolving around a planet of mass M, to transfer it from a circular orbit of radius R₁ to another radius R₂ (R₂ > R₁) is

A

B

C

D

Solution
Question 10
4 / -1

Rockets are launched in eastward direction to take advantage of

A
The clear sky on eastem side

B
The thiner atmosphere on this side

C
Earth’s rotation

D
Earth’s tilt