Gravitation Test

Result

Gravitation Test - 20

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Weekly Quiz Competition

Question 1
4 / -1

If mass of a body is M on the earth surface, than the mass of the same body on the moon surface is

A
M/6

B
56

C
M

D
None of these
Question 2
4 / -1

If the radius of earth is R then height ‘h’ at which value of ‘g’ becomes one - fourth is

A
R/4

B
3R/4

C
R

D
R/8

Solution
Question 3
4 / -1

If the mass of earth is 80 times of that of a planet and diameter is double that of planet and ‘g’ on the earth is 9.8 ms^-2 , then the value of ‘g’ on that planet is = ............... ms^-2

A
4.9

B
0.98

C
0.49

D
49

Solution
Question 4
4 / -1

Assuming earth to be a sphere of a uniform density, what is value of gravitational acceleration in mine 100 km below the earth surface = ............... ms^-2

A
9.66

B
7.64

C
5.00

D
3.1

Solution
Question 5
4 / -1

A body weight 500 N on the surface of the earth. How much would it weight half way below the surface of earth

A
125N

B
250N

C
500N

D
1000N

Solution
Question 6
4 / -1

Weight of a body is maximum at

A
moon

B
poles of earth

C
Equator of earth

D
Center of earth
Question 7
4 / -1

At what distance from the center of earth, the value of aceeleration due to gravity g will be half that of the surfaces (R = Radius of earth)

A
2R

B
R

C
1.414 R

D
0.414 R

Solution
Question 8
4 / -1

The acceleration due to gravity near the surface of a planet of radius R and density d is proportional to

A
d/R²

B
dR²

C
dR

D
d/R

Solution
Question 9
4 / -1

The acceleration due to gravity is g at a point distance r from the center of earth R. if r < R then

A
g α r

B
g α r²

C
g α r^-2

D
g α r^-1

Solution
Question 10
4 / -1

Density of the earth is doubled keeping its radius constant then acceleration, due to gravity will be .................. ms^-2(g = 9.8 ms²)

A
19.6

B
9.8

C
4.9

D
2.45