**MCQ Questions for Class 9 Science Chapter 10 Gravitation with Answers**

**Q1. If an object is thrown upwards (ascent) from the ground, when it reaches a certain height and then falls downwards. How much time will it take to come on the ground ?**

**Less time to the ascent****Equal to the time of the ascent****Greater time to the ascent****None of these**

Ans:- Equal to the time of the ascent

**Q2. If a boy ties a small stone at one end of the thread, hold the other end of the thread and whirl it round. This activity described :-**

**Circular path movement****Circular path with a velocity of non-constant magnitude****Circular path with a velocity of constant magnitude****None of the above**

Ans:- Circular path with a velocity of constant magnitude

**Q3. The force that causes a velocity of constant magnitude of acceleration and keeps the body moving along the circular path is acting towards the center. This force is called :- **

**Circular path of motion****Center path****Centripetal force****Center circular force**

Ans:- Centripetal force

**Q4. A straight line that meets the circle at one and only one point is called a _______ of the circle.**

**Meet point****Face point****Join point****Tangent**

Ans:- Tangent

**Q5. The force of attraction between the objects is called :- **

**Gravitational force****Magnetic force****Contact force****None of these**

Ans:- Gravitational force

**Q6. What does Newton conclude about the gravitational force **

**All object in the universe have their own gravity****All objects in the universe attract each other by magnetic force****All objects in the universe attract each other****All of these**

Ans:- All objects in the universe attract each other

**Q7. The force which is proportional to the product of their masses and inversely proportional to the square of the distance between them is called **

**Gravity****Universal law of gravitation****Law of motion****None of these**

Ans:- Universal law of gravitation

**Q8. What is the Universal law of gravitation equation ?**

**F=G×Mm²/d²****F=G×Mm/d²****G=M×Fm/d²****d²=F×Mm/G²**

Ans:- F=G×Mm/d²

**Q9. Who found the value of ‘G’ ?**

**Henry Cavendish****Isaac Newton****Einstein****All of these together discovered the value of ‘G’**

Ans:- Henry Cavendish

**Q10. Saying that ***F*** is inversely proportional to the square of ***d ***means, for example that if ***d ***gets bigger by a factor of 6, ***F ***becomes :-**

**⅙ times smaller****⅛ times smaller****1/16 times bigger****1/36 times smaller**

Ans:- 1/36 times smaller

**Q11. If a big stone or a small stone dropped on the ground at the same height and same time. Which one will fall on the ground first ?**

**Small stone****Big stone****Both at the different times****Both at the same times**

Ans:- Both at the same time

**Q12. If the distance between object decrease and the gravitational force between the object will be:**

**Remain same****Increase****Decrease****None of these**

Ans:- Increase

**Q13. The Value of acceleration due to gravity of earth :-**

**Increase from the pole to the equator****Is least on the poles****Is least on the equator****Same on the equator and the poles**

Ans:- Is least on the equator

**Q14. If an object mass on the moon surface is 40kg then what will be the mass of the same object on the earth surface ?**

**40kg****20kg****10kg****6.66kg**

Ans:- 40kg

**Q15. The objects falls towards the earth under the gravity alone, we say that the objects are in :**

**Gravitational force****Free fall****Magnetic force****None of them**

Ans:- Free fall

**Q16. Which of the following is true for two bodies separated by some distance?**

**When the distance between them is half the gravitational force becomes 4 times****When one of the mass becomes half, the gravitational force becomes half****When the distance between them is increased 4 times, Gravitational force becomes 1/16 times****All of the above**

Ans:- All of the above

**Q17. The weight of the body at a certain place is 30N. The acceleration due to gravity at the point is 10 m/s². Find out the mass and weight of the object at the place where acceleration due to gravity is zero ?**

**6 kg, 60N****3 kg, 0N****3 kg, 3N****None of the above**

Ans:- 3 kg, 0N

**Q18. the weight of any object or body on the surface area of moon is :**

**1/6th of the weight of an object on the surface of the earth****1/2th of the weight of an object on the surface of the earth****1/16th of the weight of an object on the surface of the earth****1/8th of the weight of an object on the surface area of the earth**

Ans:- 1/6th of the weight of an object on the surface of the earth

**Q19. The force acting on an object perpendicular to the surface is called **

**Pressure****Thrust****Weight****Centripetal force**

Ans:- Thrust

**Q19. What does the value of thrust in per unit area is **

**Weight****Newton****Joule****Pressure**

Ans:- Pressure

**Q20. What does Pascal’s law states **

**Pressure exerted in any confined mass of fluid is transmitted equally in all directions****Pressure exerted in any confined mass of fluid is transmitted in only one direction****Pressure exerted in excepted confined mass of fluid is transmitted in only opposite directions****None of these**

Ans:- Pressure exerted in any confined mass of fluid is transmitted equally in all directions

**Q21. The upward force exerted by the water in any object is known as **

**Gravitational force****Friction force****buoyant force****None of the above**

Ans:- buoyant force

**Q22. An object having mass 350g occupies 200 cm³ of space. What happens when it falls into a river? What will be the condition of this object there? (Density of water = 1 g/cm³)**

**It will float fully in the river****It will float partially****It will sink on the liquid****None of these**

Ans:- It will sink on the liquid

**Q23. What does Archimedes’ Principle states **

**A body mass in a liquid loses weight by an amount equal to the weight of the liquid displaced****A body mass in a liquid loses weight by an amount unequal to the weight of the liquid displaced****A body weight in a liquid loses mass by an amount unequal to the weight of the liquid displaced****None of the above**

Ans:- A body mass in a liquid loses weight by an amount equal to the weight of the liquid displaced

**Q24. The ratio of the density of a substance to the density of water is known as **

**Buoyant density****Relative density****Float or sink ratio****None of these**

Ans:- ** **Relative density

**Q25. Box having 80 cm length, 60cm and 20cm width. In which of the following cases is pressure exerted by the brick ?**

**Maximum when width and length on the base****Maximum when breadth and width on the base****Maximum when length and breadth on the base****Same in all the three cases**

Ans:- Maximum when breadth and width on the base