Complete guide to "Gravitation" for Physics students. Below you will find important questions and model answers to help you prepare.
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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
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
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
2 F
A boy is whirling a stone tied with a string in an horizontal circular path. If the string breaks, the stone
will continue to move in the circular path
will move along a straight line towards the center of the circular path
will move along a straight line tangential to the circular path
will move along a straight line perpendicular to the circular path away from the boy
An object is put one by one in three liquids having different densities. The object floats with 1/9, 2/11 and 3/7 parts of their volumes outside the liquid surface in liquids of densities d₁, d₂ and d₃ respectively. Which of the following statement is correct?
d₁ > d₂ > d₃
d₁ > d₂ < d₃
d₁ < d₂ > d₃
d₁ < d₂ < d₃
In the relation F = G M 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
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 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
Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be
1/4 times
4 times
1/2 times
unchanged
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
gravitational field
universal gravitational constant
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
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
A girl stands on a box having 60 cm length, 40 cm breadth and 20 cm width in three ways. In which of the following cases, pressure exerted by the brick will be
maximum when length and breadth form the base
maximum when breadth and width form the base
maximum when width and length form the base
the same in all the above three cases
An apple falls from a tree because of gravitational attraction between the earth and apple. If F₁ is the magnitude of force exerted by the earth on the apple and F₂ is the magnitude of force exerted by apple on earth, then
F₁ is very much greater than F₂
F₂ is very much greater than F₁
F₁ is only a little greater than F₂
F₁ and F₂ are equal