/
gp = 1/2ge
gp = ge
gp = 2ge
gp = 4 ge
Given: mass of the earth is 80 times the mass of moon, and the radius of the moon is 1/4th the radius of the earth.
The value of acceleration due to gravity on the surface of moon will be ___ where ge denotes the acceleration due to gravity on the surface of earth.
0.16 ge
0.20 ge
0.24 ge
0.32 ge
Imagine that the diameter of the earth becomes twice its present value but its mass remains unchanged. Then the weight of an object on its surface will become _____________ the present value
one-half
one-fourth
three-fourth
remain unchanged
AN artificial satellite stays in orbit around the earth. This may be attributed to
upward pull of the satellite
negligible earth’s gravitational field
centripetal force provided by earth’s gravitational acceleration
equilibrium between forces of attraction due to earth and other planets
A body weighing 1.6 kN at sea level is taken to a place which is 2000 km above sea level. The weight of body at that location will be
0.075 kN
0.9 kN
1.125 kN
1.2 kN
In some region, the gravitational field is zero. The gravitational potential in this region _____.
Must be variable
Must be constant
Cannot be zero
Must be zero
The ratio of the radii of planets A and B is and ratio of acceleration due to gravity on them is . The ratio of escape velocities from them will be _____.
The radius of a planet is of earth’s radius and its acceleration due to gravity is double that of earth’s acceleration due to gravity. How many times will the escape velocity at the planet’s surface be as compared to its value on earth’s surface?
2
A particle of mass 10 g is kept on the surface of a uniform sphere of mass 100 kg and radius 10 cm. Find the work to be done against the gravitational force between them to take the particle far away from the sphere (you may take _____.
6.67 ( 10–9 J
6.67 ( 10–10 J
13.34 ( 10–10 J
3.33 ( 10–10 J
Consider the earth to be a homogeneous sphere. Scientist A goes deep down in a mine and scientist B goes up high in a balloon. The gravitational field measured by ____.
A goes on decreasing and that by B goes on increasing
B goes on decreasing and that by A goes on increasing
each remains unchanged
each goes on decreasing