Advertisements
Advertisements
Question
What is the importance of the universal law of gravitation?
Solution
The importance of the universal law of gravitation is as follows:
- Through this law, we can find the mass of the earth, sun, etc.
- Using this law, the distance between planets and other bodies is found.
- Due to this force, the moon moves around the earth.
- It is understood from this law that the tides in the sea occur due to the moon and the sun.
APPEARS IN
RELATED QUESTIONS
What happens to the force between two objects, if the masses of both objects are doubled?
Choose the correct answer from among the given ones:
For the problem 8.10, the direction of the gravitational intensity at an arbitrary point P is indicated by the arrow (i) d, (ii) e, (iii) f, (iv) g.
At noon, the sun and the earth pull the objects on the earth's surface in opposite directions. At midnight, the sun and the earth pull these objects in same direction. Is the weight of an object, as measured by a spring balance on the earth's surface, more at midnight as compared to its weight at noon?
Let V and E be the gravitational potential and gravitational field at a distance r from the centre of a uniform spherical shell. Consider the following two statements :
(A) The plot of V against r is discontinuous.
(B) The plot of E against r is discontinuous.
A ball is thrown vertically upwards. It goes to a height 20 m and then returns to the ground. Taking acceleration due to gravity g to be 10 ms-2 , find :
the total time of journey of the ball .
A ball is thrown up with a speed of 4.9 ms-1.
Calculate the maximum height it would gain before it begins to fall.
Where will you weigh more: at the moon's surface or at the earth's surface?
Is there a gravitational attraction between you and the book? Explain.
Molecules in air in the atmosphere are attracted by gravitational force of the earth. Explain why all of them do not fall into the earth just like an apple falling from a tree.
How is the gravitational force between two point masses affected when they are dipped in water keeping the separation between them the same?
