Advertisements
Advertisements
Question
What is the importance of the universal law of gravitation?
Advertisements
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
Consider a planet moving in an elliptical orbit round the sun. The work done on the planet by the gravitational force of the sun
(a) is zero in any small part of the orbit
(b) is zero in some parts of the orbit
(c) is zero in one complete revolution
(d) is zero in no part of the motion.
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 .
All objects in the universe attract each other along the line joining their________.
Is the law of gravitation applicable in case of the sun and the moon?
An apple falls towards the earth due to its gravitational force. The apple also attracts the earth with the same force. Why do we not see the earth rising towards the apple? Explain.
The value of universal gravitational constant (G) in the SI unit is ______.
Law of gravitation gives the gravitational force between
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.
Shown are several curves (Figure). Explain with reason, which ones amongst them can be possible trajectories traced by a projectile (neglect air friction).
Observe the figure and answer the questions:
- State Newton's universal law of gravitation.
- If the distance between the two bodies is tripled, how will the gravitational force between them change?
- What will happen to gravitational force, if mass of one of the object is doubled?
