GP Gravitation
Which statements about gravitational force is not correct
Which one of the following statements about gravitational force is not correct?
- It is experienced by all bodies in the universe
- It is a dominant force between celestial bodies
- It is a negligible force for atoms
- It is same for all pairs of bodies in our universe
Planet A has double the radius than that of planet B
Planet A has double the radius than that of planet B. If the mass of planet A is 4 times heavier than the mass of planet B, which of the following statements regarding weight of an object is correct?
- Heavier on Planet B than on Planet A
- Same on both the Planets
- Cannot be measured on Planet B
- Heavier on Planet A than on Planet B
An object weighs 10 N in air. When immersed fully in water, it weighs only 8 N
An object weighs 10 N in air. When immersed fully in water, it weighs only 8 N. The weight of the liquid displaced by the object will be
- 2 N
- 8 N
- 10 N
- 12 N
The weight of an object at the centre of the earth of radius R is
The weight of an object at the centre of the earth of radius R is
- zero
- infinite
- R times the weight at the surface of the earth
- 1/R2 times the weight at surface of the earth
The value of quantity G in the law of gravitation
The value of quantity G in the law of gravitation
- depends on mass of earth only
- depends on radius of earth only
- depends on both mass and radius of earth
- is independent of mass and radius of the earth
Law of gravitation gives the gravitational force between
Law of gravitation gives the gravitational force between
- the earth and a point mass only
- the earth and Sun only
- any two bodies having some mass
- two charged bodies only
The gravitational force between two objects is F
The gravitational force between two objects is F. If masses of both objects are halved without changing distance between them, then the gravitational force would become
- F/4
- F/2
- F
- 2F
The value of acceleration due to gravity
The value of acceleration due to gravity
- is same on equator and poles
- is least on poles
- is least on equator
- increases from pole to equator
Two objects of different masses falling freely
Two objects of different masses falling freely near the surface of moon would
- have same velocities at any instant
- have different accelerations
- experience forces of same magnitude
- undergo a change in their inertia