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Class 9 Science Chapter 10 Gravitation Quiz 3 (25 MCQs)

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1. Suppose Fg between two massive spheres M and m is F. If masses were M and 3m, Fg would be:
2. Tom and Jerry pass each other in the hallway. Tom has a mass of 65 kg, and Jerry has a mass of 55 kg. If the center of mass of the two students is 1.00 m, then what is the force acting on Tom?
3. When a planet orbits the Sun, one of the foci of the elliptical orbit is
4. An object has a mass 36 kg on earth find its weight on the moon (approximated values)
5. The ball is thrown up, the value of 'g' will be
6. When a mango falls from a mango tree then
7. A ball is thrown vertically upward with 40 m/s speed. Find the time when it reaches the maximum height. Take g =10 m/s2
8. The S.I unit of 'g' is
9. Name the force that cause acceleration of an object moving along a circle and keeps the body moving
10. If I double the mass of one object, but don't change anything else ..... WHat happens to the gravitational force between two objects?
11. A stone dropped from the roof of a building takes 4s to reach the ground.Calculate the height of the building.A stone that is released from the roof of a building reaches the earth in 4s.Remove the height of the building.
12. What is 0 in upward free fall
13. In the relation, F= GMm/R$^{2}$$^{the quantity G}$
14. Why do we weight less on moon as compared to earth?
15. The force of gravitation between two object varies with ' r'
16. The weight of an object at the center of the Earth of Radius R is:The center of an earth, which is R, will be loaded with an object in the center:
17. Kepler's 2nd Law deals with
18. The moon and other satellites rotate around the earth. Identify the force that keeps these satellites in orbit.
19. Mass is a ..... quantity.
20. The gravitational force between two bodies of masses m1 and m2 separated by distance r is F. State the effect on the gravitational force when m1 increases twice.
21. A satellite of the earth is revolving in a circular orbit with a uniform speed v. If the gravitational force suddenly disappears, the satellite will
22. Where is ULG (universal law of gravitation) not used
23. If the distance between two objects is doubled, how does the gravitational force between them change?
24. Which off the following statement is correct about acceleration due to gravity
25. The acceleration due to gravity on the Earth depends upon the
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