|
How does the weight of an object vary with respect to mass and radius of the earth?
|
|
0
|
1916
|
March 21, 2018
|
|
Show that the weight of an object on the moon is 1/6th of its weight on the earth
|
|
0
|
5999
|
March 21, 2018
|
|
Define acceleration due to gravity. Derive an expression for acceleration due to gravity in terms of mass of the earth (M) and universal gravitational constant (G)
|
|
0
|
15845
|
March 21, 2018
|
|
Derive expression for force of attraction between two bodies and then define gravitational constant
|
|
0
|
19993
|
March 21, 2018
|
|
Two objects of masses m1and m2 having the same size are dropped simultaneously from heights h1 and h2, respectively
|
|
0
|
3060
|
March 21, 2018
|
|
Prove that if a body is thrown vertically upward, the time of ascent is equal to the time of descent
|
|
0
|
6077
|
March 21, 2018
|
|
Calculate the average density of the earth in terms of g, G and R
|
|
0
|
4922
|
March 21, 2018
|
|
On the earth, a stone is thrown from a height in a direction parallel to the earth’s surface while another stone is simultaneously dropped from the same height. Which stone would reach the ground first and why?
|
|
0
|
7919
|
March 21, 2018
|
|
Give three differences between acceleration due to gravity (g) and universal gravitational constant (G)
|
|
0
|
15414
|
March 21, 2018
|
|
Prove that if the earth attracts two bodies placed at same distance from the centre of the earth with the same force, then their masses are equal
|
|
0
|
28816
|
March 21, 2018
|
|
Suppose that the radius of the earth becomes twice of its original radius without any change in its mass. Then what will happen to your weight?
|
|
0
|
19146
|
March 21, 2018
|
|
What is the source of centripetal force that a planet requires to revolve around the sun? On what factors does that force depend?
|
|
0
|
893
|
March 21, 2018
|
|
Why does a body reach the ground quicker at poles than at the equator when dropped from the same height?Why does a body reach the ground quicker at poles than at the equator when dropped from the same height?
|
|
0
|
10830
|
March 21, 2018
|
|
When does an object show weightlessness?
|
|
0
|
5380
|
March 21, 2018
|
|
Mention any four phenomena that the universal law of gravitation was able to explain
|
|
0
|
12698
|
March 21, 2018
|
|
The earth attracts an apple. Does the apple also attract the earth? If it does, why does the earth not move towards the apple?
|
|
0
|
2919
|
March 21, 2018
|
|
Find the height from the surface of earth at which weight of a body of mass tn reduced to 36% of its weight on the surface. (${{R}_{e}}$ = 6400 km.)
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|
1
|
7672
|
December 9, 2017
|
|
Define period of revolution
|
|
1
|
9428
|
December 24, 2016
|
|
Does the escape speed of a body from the earth depend on
|
|
1
|
2123
|
December 24, 2016
|
|
Does the change in gravitational potential energy
|
|
1
|
1193
|
December 24, 2016
|
|
The earth is acted upon by the gravitational attraction of the sun. Why don't the earth fall into the sun?
|
|
0
|
2318
|
December 24, 2016
|
|
If suddenly the gravitational force of attraction between the earth and a satellite revolving around it becomes zero, what will happen to the satellite?
|
|
0
|
1843
|
December 24, 2016
|
|
An astronaut by mistake
|
|
1
|
2174
|
December 24, 2016
|
|
On what factor does the escape speed from a surface depend?
|
|
0
|
2389
|
December 24, 2016
|
|
If the kinetic energy of a satellite revolving around the earth in any orbit is doubled, what will happen to it?
|
|
0
|
2863
|
December 24, 2016
|
|
A satellite does not need any fuel to circle around the earth. Why?
|
|
0
|
3854
|
December 24, 2016
|
|
Derive an expression for work done against gravity?
|
|
0
|
7972
|
December 24, 2016
|
|
An object of mass m
|
|
1
|
650
|
December 24, 2016
|
|
Assuming the earth to be a sphere of uniform mass density
|
|
1
|
1532
|
December 24, 2016
|
|
What is the gravitational potential energy
|
|
1
|
831
|
December 24, 2016
|