Question 1 :
What is the ratio of the gravitational pull of the sun on the moon to that of the earth on the moon?
Question 3 :
What will be the weight of a body of mass $m$ kg at the centre of the earth?
Question 4 :
The value of 'g' at the depth fromthe ground goes on _____________.
Question 5 :
Assertion: Pins and nails are made to have pointed ends in order to have the minimal area of contact between the pointed ends and the given surface.
Reason: Minimal area of contact means that the pressure applied on the surface by the pin is greater.
Question 6 :
The normal force of an object of mass 5 kg , measured by a force metre is seen to be 50 N. Determine the acceleration due to gravity in $cm/s^2$
Question 7 :
The SI unit of relative density is kg/m$^3$. True or false.
Question 8 :
A body is floating in water such that 6 out of 10 parts of its volume is under water. Its density is
Question 10 :
As a body moves from the equator to the poles, the value of g experienced by the body
Question 12 :
A body measures $5 N$ in air and $2 N$ when put in water. The buoyant force is:-
Question 15 :
Calculate the relative density of zinc when its density is $\displaystyle 7{ g }/{ { cm }^{ 3 } }$.
Question 16 :
Assertion: An object may fall with a constant velocity.
Reason: This happens when acceleration of the object is equal to acceleration due to gravity
Question 17 :
The upward force exerted by the floating body on the fluid is known as upthrust.
Question 18 :
When a body is taken from the earth to the moon: 
Question 20 :
A rocket of mass $120 kg$ is fired in a gravity free space is ejecting gases with velocity $600m/s$ at the rate of $1kg/s$. What will be the initial acceleration of the rocket?
Question 21 :
According to the law of floatation weight of floating body is -
Question 22 :
An astronaut in a space station orbits above the Earth.<br>In the space station, the acceleration due to gravity is $7.5\ m / s^{2}$.<br>On Earth, the acceleration due to gravity is $10\ m / s^{2}$.<br>Which statement about the astronauts mass and weight in the space station is correct?
Question 24 :
If the weight of a body on the earth is 12 Newtons (N), its weight on the moon will be:
Question 25 :
The weight of an object in air is $25 N$ and the weight of that object when submerged in water is $20 N$? What is the relative density of the object? 
Question 26 :
Acceleration due to gravity for a particle on earth is $9.8 m/s^2$. If the mass of the particle is doubled, then its acceleration also doubles
Question 28 :
Assertion: Density of a substance is the ratio of mass of the substance to its volume
Reason: Relative density is the ratio of density of substance to the density of water at 4$^{\circ}$C
Question 29 :
If an immersed object displaces liquid weighing $10\ N$, the buoyant force on the object is <br/>
Question 31 :
A man is standing on a weighing machine placed in a lift. When stationary, his weight is recordedas $40\ kg$. If the lift is accelerated upward with an acceleration of $2\ m/s^{2}$,then the weight recorded inthe machine will be $g = 10\ m/s^{2}$.<br>
Question 32 :
The unit of mass in SI system is ______ and the unit of weight in SI system is _______.
Question 33 :
The unit of relative density is $M^{x} L^{y} T^{z}$ . Find x+y+z.
Question 34 :
A body of weight $W_1$ is suspended from the celling of a room through a chain of weight $W_2$ The earth pulls the chain by a force equal to:
Question 35 :
Value of 'g' on moon is _________ of the value of 'g' on earth. Fill in the blank.
Question 36 :
The acceleration of free fall for object moving near the surface of Earth is:
Question 37 :
On the earth surface, 'g' is a vector and its direction is oriented towards the centre of the
Question 39 :
The density of a substance is $7100 kg m^{-3}$, its relative density is :
Question 40 :
The force of gravity with which a body is attracted towards the center of the earth is _________. <br/>
Question 41 :
<u></u>Specific weight of sea-water is more than that of pure water because it contains:<br/>
Question 42 :
As the density of a series of liquids increases, the upthrust on the iron rod submerged ________.
Question 43 :
The weight of 50 kg person at the surface of earth is ................
Question 44 :
If the mass of a body is M on the surfrace of the earth, then its mass on the surface of the moon will be:<br/>
Question 45 :
Calculate the weight of the block at a distance of four times of Earth radii from the center of the Earth. It is given that g is the acceleration due to gravity at the surface of Earth and mass of the block is m.
Question 46 :
A person stands on a weighing machine kept on the floor of an elevator, if the elevator moves down with a constant acceleration, the apparent weight of the person
Question 47 :
State whether the given statement is True or False :Acceleration due to gravity, ${g=\frac{GM}{R^2}}$ where symbols have their usual meanings.
Question 48 :
Assertion: Pressure inside water-drop is more than that outside drop.
Reason: Water molecules at the surface layer experience net inward force and hence all the water molecules on surface exert force on just inner layer molecules giving rise to a kind of volumetric compression
Question 49 :
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 50 :
Which on of the following would a hydrogen balloon find easiest to lift?
