1) Is there any meaning of "Weight of the Earth"? I think it has, but it will be different for different planets and stars since they have different masses, so they'll be attracting earth towards themselves with different magnitude of force because,
g(acceleration due to gravity) = √GM/R2, where M & R are the mass and the radius of the body that is attracting earth towards itself
If I am wrong then please correct me.
2)At noon, the sun and the earth pull the objects on the earth's surface in opposite direction. At midnight the sun and the earth pull these objects in the same direction. Is the weight of an object as measured by the spring balance on the earth's surface more at midnight as compared to its weight at noon?
3)An apple falls from a tree. An insect in the apple finds that the earth is falling towards it with an acceleration g. Who exerts the force needed to accelerate the earth with this acceleration g?
4)A nut becomes loose and gets detached from a satellite revolving around the earth. Will it land on earth? If yes then where? If no, how can an astronaut make it land on the earth?
Well the nut will land or not on the earth depends on where it is located, it will surely land on the earth if its inside the satellite( yeah I agree that, for that satellite too has to land on the earth). It is also depended on where satellite is located, if it is located far away from the earth and the nut is out side it and where the gravitational force is only optimum may be then nut will fly off in the space.
Don't know how will astronaut will make it land on earth. :P:P So please help. :)
71This is similar to a Problem Where a person or say an astronaut is holding a book and suddenly he leaves the books or removes his support from it. Then what should happen to the book.?
Exactly, the book will remain there as it is until unless an other unbalancing force is applied by the astronaut.
115)Is it necessary for the plane of the orbit of a satellite to pass through the centre of the earth?
What about this question? Give your views on it too :P :)
71Really, I haven't reach upto that chapter.. But I think It should :P.
Now Don't ask me how did I say that. :P :P
11Some more questions
7)Take the effect of bulging of earth on its rotation in account. Consider the following statements,
a) there are points outside the earth where the value of g is equal to its value t the equator.
b)There are points outside the earth where the value of g is equal to its value at the poles.
Which of them is correct?
