GRAVITATION

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

• (a) have same velocities at any instant

• (b) have different acceleration

• (c) experience forces of same magnitude

• (d) undergo a change in their inertia

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

The value of acceleration due to gravity

• (a) is same on equator and poles

• (b) is least on poles

• (c) is least on equator

• (d) decreases from pole to equator

Tags

NGSS.HS-PS2-4

The gravitational force between two objects is F. If masses of both objects are halved without changing the distance between them, then the gravitational force would become

• F/8

• F/4

• F/2

• 4F

Tags

NGSS.HS-PS2-4

A boy is whirling a stone tied to a string in a horizontal circular path. If the string breaks, the stone

• (a) will continue to move in the circular path

• (b) will move along a straight line towards the center of the circular path

• (c) will move along a straight line tangential to the circular path

• (d) will move along a straight line perpendicular to the circular path away from the boy

Tags

NGSS.HS-PS2-2

In the relation F = GM m/d², the quantity G

• depends on the value of G at the place of observation

• is used only when the Earth is one of the two masses

• is greatest at the surface of the Earth

• is universal constant of nature

Tags

NGSS.HS-PS2-4

Law of gravitation gives the gravitational force between

• (a) the Earth and a point mass only

• (b) the Earth and Sun only

• (c) any two bodies having some mass

• (d) two charged bodies only

Tags

NGSS.HS-PS2-4

The value of quantity G in the law of gravitation

• (a) depends on mass of Earth only

• (b) depends on radius of Earth only

• (c) depends on both mass and radius of Earth

• (d) is independent of mass and radius of the Earth

Tags

NGSS.HS-PS2-4

Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them is increased by two times, the value of gravitational force between them will be

• 1/4 times

• 1/8 times

• 1/16 times

• unchanged

Tags

NGSS.HS-PS2-4

The atmosphere is held to the Earth by

• (a) gravity

• (b) wind

• (c) clouds

• (d) Earth’s magnetic field

Tags

NGSS.HS-PS2-4

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

• (a) gravitational potential

• (b) acceleration due to gravity

• (c) gravitational field

• (d) universal gravitational constant

Tags

NGSS.HS-PS2-4