1. State the universal law of gravitation. 2. Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth. 3. How does the force of gravitation between two objects change when the distance between them is reduced to half? 4. TRY ATTEMPTING THIS(What is the magnitude of the gravitational force between the earth and a 1 kg object on its surface? [Mass of the earth is 6 x 10^24 kg and radius of the earth is 6.4 x 10^6 m]. The symbol ^ denotes "raise to the power". 5.The earth and the moon are attracted to each other by gravitational force. Does the earth attract the moon with a force that is greater or smaller or the same as the force with which the moon attracts the earth? Why? 6. If the moon attracts the earth, why does the earth not move towards the moon? 7. What happens to the gravitational force between two objects, if (i) the mass of one object is doubled? (ii) the distance between the objects is doubled and tripled? (iii) the masses of both objects are doubled?
Answers
Answer:
1) according to the universal law of gravitation each object that has mass attracts the other object that has mass at a particular separation.
2)F=GMm/R^2
3) mathematically if The Separation of two objects is reduced to half then the gravity between them will be 4 times.
5) due to the greater mass of the earth the earth has greater gravitational force influence on moon as well as moon is in the the hill sphere of the Earth due to which it revolves around it.
6) video Budha Moon and Earth attract each other with different gravity gravitational force but due to the net force of the gravities, the earth insta attract the moon in its Orbit.
Consider F is the force of attraction between an object on the surface of earth and earth.
Also consider ‘m’ is the mass of the object on the surface of earth and ‘Me’ is the mass of earth.
Therefore the formula for magnitude of the gravitational force between the earth and an object on the surface is given as
G = GM1m2 / r²