Question 1 :
If the mass of the body on the surface of the earth is $50\ kg$, its mass at the centre of the earth is:
Question 3 :
A body measures $5 N$ in air and $2 N$ when put in water. The buoyant force is:-
Question 5 :
If $g = 10 m{s}^{-2}$, what is the force of gravity acting on a mass of $1 kg$ ?
Question 7 :
Fill in the blank.It is the ______ which makes balloon to rise in air. 
Question 9 :
State whether the weight of an iron sinker with cork combined in water will be more or less than that of the iron sinker alone in water. 
Question 10 :
When an object moves with a constant acceleration, under the influence of force of gravitation of the earth only, the object is said to have:
Question 12 :
When a body is partially or completely immersed in a fluid at rest, it experiences an upthrust which is equal to the weight of the fluid displaced by it.
Question 13 :
<br>If the densities are equal then what is the relative density?
Question 14 :
If the density of a block is $981 {kg}/{{m}^{3}}$, it shall
Question 16 :
The earth is an approximate sphere. If the interior contained matter which is not of the same density everywhere, then on the surface of the earth, the acceleration due to gravity :
Question 17 :
60 cc of a liquid of relative density 1.4 is mixed with 40 cc of another liquid of relative density 0.8. The density of the resulting mixture will be
Question 18 :
If an immersed object displaces liquid weighing $10\ N$, the buoyant force on the object is <br/>
Question 19 :
The value of g on the moon is $\dfrac {1}{6}th$ that on earth. A body weighing 60 kg on the earth has weight on the moon equal to?
Question 21 :
Consider earth to be a homogeneous sphere , Scientist A goes deep down in a mine and scientist B goes high up in a balloon. The acceleration due to gravity as measured by : 
Question 22 :
There is a planet name 'ALLEN' which has radius three times that of the earth and density two times that of the earth. The acceleration due to gravity on 'ALLEN' will be
Question 23 :
A person jumps from the fifth storey of a building with load on his head. The weight experienced by him before reaching the earth will be:
Question 24 :
A student is weighing an object using a spring balance. The weight and mass of the object are respectively ${(g= 10m/s^2)}$
Question 26 :
A body floats with $\dfrac {1}{3}{rd}$ of its volume outside water and with $\dfrac {3}{4}$th of its volume outside a given liquid, then the density of the given liquid is equal to
Question 27 :
If the mass of earth is $80\ times$ of that of a planet and diameter is double that of planet and $'g'$ on the earth is $9.8\ ms^{-2}$, then the value of $'g'$ on the planet is =_____ $ms^{-2}$
Question 28 :
For moon its mass is $\frac { 1 }{ 81 }$ of earth's mass and its diameter is $\frac { 1 }{ 3.7 }$ of earth's diameter. If acceleration due to gravity of earth surface is $9.8m/{ s }^{ 2 }$, then at moon its value is
Question 29 :
State whether true or false.<br/>The maximum heights reached by the bodies that are vertically projected with the same velocity on the surface of the moon and the earth are same.
Question 30 : <p>A body falls for $5s$ from rest. If the acceleration due to the gravity of earth ceases to act, The distance travels in the next $3s$ is.</p>
Question 31 :
A block of wood is floating on water with its dimensions $50  cm\times 50  cm\times 50  cm$ inside water. The buoyant force acting on the block is X N. Find X.  Take $g=9.8 \ N   kg^{-1}$. 
Question 32 :
A stone drop from height 'h' reaches to earth surfacein 1 sec. If the same stone taken to moon and dropfreely then it will reaches from the surface of themoon in the time:
Question 33 :
The radius of Earth is about $6400\ km$ and that of Mars is $3200\ km$. The mass of the Earth is about $10$ times mass of Mars. An object weighs $200\ N$ on the surface of Earth. Then its weight on the surface of Mars will be:
Question 34 :
The light vertically above the earth's surface at which the acceleration due to gravity becomes $1\%$ of its value at the surface is ___?(R is the radius of the earth)
