(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Physics

Who stated the law of gravitation?

Distinguish between gravity and gravitation

How will the force of gravitation between two objects change if the distance between them is:
Halved

How will the force of gravitation between two objects change if the distance between them is:
Doubled

How will the force of gravitation between two objects change if the distance between them is:
Made four times

How will the force of gravitation between two objects change if the distance between them is:
Infinite

How will the force of gravitation between two objects change if the distance between them is:
Almost zero

All objects in the universe attract each other along the line joining their________.

The force of attraction between any two material objects is called __________.

Is the law of gravitation applicable in case of the sun and the moon?

Why don't you feel the force of attraction between your friend sitting close to you and yourself?

A ball is thrown up with a speed of 4.9 ms^-1.
Calculate the maximum height it would gain before it begins to fall.

A ball is thrown up with a speed of 4.9 ms^-1.
Calculate the time it takes to reach this height.

A ball is thrown up with a speed of 4.9 ms^-1.
Prove that the time of ascent is equal to the time of descent.

Where will you weigh more: at the centre of the earth or at the surface of the earth?

Where will you weigh more: at the moon's surface or at the earth's surface?

What is meant by the equation :
`g= Gxxm/r^2`
where the symbols have their usual meanings.

At what height above the earth's surface would the value of acceleration due to gravity be half of what it is on the surface? Take the radius of earth to be R.

A force can produce ________, In an object at rest. It can __________ an object and change its __________ of motion.

What does a force do in the following case?
You pull the skin of your arm