If the density of a small planet is the ...

If the density of a small planet is the same as that of earth while the radius of the planet is `0.2` times that of the earth the gravitational on the surface of that planet is :

A

0.2 g

B

0.4 g

C

2 g

D

4 g

Text Solution

Verified by Experts

The correct Answer is:

A

`g=4/3pipGR,gpropR`
`therefore(g_1)/(g_2)=R/(0.2R)=5rArrg_2=g/5=0.2g`

Promotional Banner

Promotional Banner

Topper's Solved these Questions

GRAVITATION
ERRORLESS|Exercise NCERT BASED QUESTIONS (Gravitation Potential, Energy and Escape Velocity)|38 Videos
GRAVITATION
ERRORLESS|Exercise NCERT BASED QUESTIONS (Motion of Satellite)|46 Videos
GRAVITATION
ERRORLESS|Exercise Assertion and Reason |25 Videos
FRICTION
ERRORLESS|Exercise ASSERTION & REASON |8 Videos
KINETIC THEORY OF GASES
ERRORLESS|Exercise ASSERTION AND REASON |16 Videos

Similar Questions

Explore conceptually related problems

The radius of orbit of a planet is two times that of the earth. The time period of planet is

If the density of the planet is double that of the earth and the radius 1.5 times that of the earth, the acceleration due to gravity on the planet is

If mass of the planet is 10% less than that of the earth and radius of the planet is 20% greater than that of the earth then the weight of 40kg person on that planet is

The mass of a planet is six times that of the earth. The radius of the planet is twice that of the earth. It's the escape velocity from the earth is v , then the escape velocity from the planet is:

The mass of a planet is twice the mass of earth and diameter of the planet is thrie the diameter of the earth, then the acceleration due to gravity on the planet's surface is

If mass of the planet is "10%" less than that of the earth and radius of the planet is "20% greater than that of the earth-then the weight of "16kg" person on that planet is

If the escape velocity of a planet is 3 times that of the earth and its radius is 4 times that of the earth, then the mass of the planet is (Mass of the earth = 6 xx 10^24 kg )

ERRORLESS-GRAVITATION-NCERT BASED QUESTIONS (Acceleration Due to Gravity)

A research satellite of mass 200 kg circles the earth in an orbit of a...
Text Solution
|
The value of g decreases inside the surface of Earth because
Text Solution
|
The height of the point vertically above the earth's surface, at which...
Text Solution
|
The height a which the weight of a body becomes 1//16th its weight on ...
Text Solution
|
Two particles of mass m(1) and m(2), approach each other due to their ...
Text Solution
|
At a given place where acceleration due to gravity is g m//s^(2) a sph...
Text Solution
|
The earth is an approximate sphere. If the interior contained matter w...
Text Solution
|
If R is the radius of the earth and g the acceleration due to gravity ...
Text Solution
|
The radii of two planets are respectively R(1) and R(2) and their dens...
Text Solution
|
If the density of a small planet is the same as that of earth while th...
Text Solution
|
The radius of the earth is 6400 km and g=10m//sec^(2). In order that a...
Text Solution
|
If earth were to rotate faster than its present speed, the weight of a...
Text Solution
|
The imaginary angular velocity of the earth for which the effective ac...
Text Solution
|
The speed of earth's rotation about its axis is omega. Its speed is in...
Text Solution
|
The Value of g on the surface of earth is smallest at the equator beca...
Text Solution
|
At what depth below the surface of the earth, acceleration due to grav...
Text Solution
|
The ratio of radii of earth to another planet is 2//3 and the ratio of...
Text Solution
|
A plank is resting on a horizontal ground in the northern hemisphere o...
Text Solution
|
Assuming the earth to have a constant density, point out which of the ...
Text Solution
|
Two stars of mass m(1) and m(2) are parts of a binary star system. Th...
Text Solution
|