Gravitation Test

Result

Gravitation Test - 44

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Weekly Quiz Competition

Question 1
4 / -1

Let g be the acceleration due to gravity at earth’s surface and k be the rotational K.E. of earth suppose the earth’s radius decreases by 2% keeping all other quantities same then

A
g decreases by 2% and K decreases by 4 %

B
g decreases by 4% and K increases by 2%

C
g increases by 4% and K increases by 4%

D
g decreases by 4% and K increases by 4%

Solution
Question 2
4 / -1

The radii of two planets are respectively R₁ and R₂ and their densities are respectively ρ₁ and ρ₂ the ratio of the accelerations due to gravity at their surface is ...............

A

B

C

D

Solution
Question 3
4 / -1

At what height over the earth’s pole, the free fall acceleration decreases by one percent = .................. km (Re = 6400 km).

A
32

B
80

C
1.253

D
64

Solution
Question 4
4 / -1

The density of a newly discoverd planet is twice that of earth. The acceleration due to gravity at the surface of the planet is equal to that at the surface of earth. If the radius of the earth is R, the radius of planet would be .....................

A
2R

B
4R

C
1/4 R

D
R/2

Solution
Question 5
4 / -1

If the value of ‘g’ acceleration due to gravity, at earth surface fis 10ms^–2. its value in ms^–2 at the center of earth, which is assumed to be a sphere of Radius ‘R’ meter and uniform density is

A
5

B
10/R

C
10/2R

D
zero
Question 6
4 / -1

A research satellite of mass 200 kg. circles the earth in an orbit of avrage radius 3R/2 where R is radius of earth. Assuming the gravitational pull 10 N, the pull on the satellite will be =..........N

A
880

B
889

C
890

D
892

Solution
Question 7
4 / -1

A

B

C

D

Solution
Question 8
4 / -1

A spherical planet has a mass Mp and diameter Dp A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity, equal to

A

B

C

D

Solution
Question 9
4 / -1

Assuming the earth to have a constant density, point out which of following curves show the variation acceleration due to gravity from center of earth to points far away from the surface of earth ...............

A

B

C

D
None of these

Solution
Question 10
4 / -1

A
Depends on system of units only

B
Depends on medium between masses only

C
Depends on both (a) and (b)

D
Is independent of both (a) and (b)

Solution