Physics gravitation 9th grade

What is Gravitation?

• A force of attraction

• A force that pulls the things towards it

• Newton's invention

• All of the above

What is the gravitational force between two objects?

• attractive at large distances only

• attractive at small distances only

• attractive at all distances

• attractive at large distances but repulsive at small distances

The value of ‘g’ (Gravitation).

• Increases as we go above the earth’s surface

• Decreases as we go to the center of the earth

• Remains constant

• Is more at equator and less at poles

The ball is thrown up, the value of ‘g’ will be

• Zero

• positive

• negative

• negligible

The gravitational force causes

• Tides

• Motion of moon

• None of them

• Both a n b

Two objects of different masses falling freely near the surface of the moon would

• have same velocities at any instant

• have different acceleration

• experience forces of same magnitude

• undergo a change in their inertia

The atmosphere is held to the Earth by

• gravity

• wind

• clouds

• Earth’s magnetic field

The force of attraction between two unit point masses separated by a unit distance is called

• gravitational potential

• acceleration due to gravity

• universal gravitational constant

• gravitational field

When a mango falls from a mango tree then

• only the Earth attracts the mango.

• only the mango attracts the Earth.

• both the mango and the Earth attract each other.

• both the mango and the Earth repel each other.

SI unit of mass is …………….

(a)