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Q 1.
The force with which the earth attracts a body is called?
Ans.
Weight.
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Q 2.
At what direction does the buoyant force on an object immersed in a liquid act?
Ans.
Upward direction.
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Q 3.
Weight in newton's of a 10 kg object on the earth is 98 N. What will be its weight on moon?
Ans.
1/6 times.
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Q 4.
Weight in newton's of a 10 kg object on the earth is 98 N. What will be its weight on moon?
Ans.
1/6 times.
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Q 5.
Force of gravity will maximum at?
Ans.
Poles.
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Q 6.
Name the force of gravity that will be minimum at?
Ans.
Center of earth.
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Q 7.
Name the force of gravitation with altitude?
Ans.
Decreases.
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Q 8.
When all objects are immersed in fluid which force they are experienced?
Ans.
Force of buoyancy.
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Q 9.
What happen to the force between two objects if the mass of the object is doubled?
Ans.
Become doubled.
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Q 10.
What happens to the force between two objects if the distance between the objects is triple?
Ans.
Reduce and become 9th part.
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Q 11.
What is the SI unit of mass?
Ans.
Kg.
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Q 12.
Name the thrust on unit area is called?
Ans.
Pressure.
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Q 13.
Net force in a particular direction is called?
Ans.
Thrust.
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Q 14.
Where the weight of an object will be greater at?
Ans.
Poles.
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Q 15.
When a body is immersed fully or partially in a fluid. It experience an upward force that is equal to the weight of the fluid displaced it. This is stated by?
Ans.
Archimedes principle.
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Q 16.
Name the unit of pressure?
Ans.
Pascle.
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Q 17.
Name the scientist who invited Calculus?
Ans.
Issac Newton.
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Q 18.
The weight is equal to the product of ___and acceleration due to gravity?
Ans.
Mass.
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Q 19.
When the distance between the two objects is reduced to half, the force of gravitation between them will be?
Ans.
Becomes four time.
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Q 20.
What is the mass of earth?
Ans.
6×10 ki power 24.
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Q 21.
What is the unit of density?
Ans.
Kilograms per meter cube.
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