# CBSE Class 9 Gravitation

CBSE Assignment for Class 9 Science -Gravitation . Based on CBSE and CCE guidelines. The students should read these basic concepts to gain perfection which will help him to get more marks in CBSE examination.

10. Gravitation

Q 1 An object dropped from a height always fall towards earth. Why?

Q 2 Weight of an object on earth and moon is different. Why?

Q 3 In your daily life you experience force of gravitation. Give some examples,

Q 4 What is gravitation?

Q 5 State Newton‘s law of motion.

Q 6 What do you understand by centripetal force?

Q 7 What do you understand by gravitational force?

Q 8 What do you understand by free fall of an object?

Q 9 How does the force of gravitation between two objects change on reducing the distance to half?

Q 10 How will you calculate relative density of a cork using Archimedes‘s Principle?

Q 11 (i) How do fishes float in water?

(ii) Write the conditions that takes place when a solid is immersed in a fluid.

Q 12 The force on a phonogram needle of cross-section of radius of 0.01cm, is 1.5N. Find the pressure it exerts on the record in (i) Pa (ii) atm

Q 13 What do you understand by relative density? What is the unit of relative density? Manoj have a metal block of dimension 25cm x 10cm x 5cm. Now, if the mass of the block is 5kg, then calculate the greatest and least pressure exerted by the block?

Q 14 A piece of iron is totally immersed in water. If its density is 7.8 x 103kg/m3 and volume is 10-4m3 then calculate

(i) The upthrust

(ii) Apparent weight of iron piece in water

Please refer to attached file forCBSE Class 9 Gravitation

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