Question 1 :
If a rock is brought from the surface of the moon<br>
Question 4 :
A body measures $5 N$ in air and $2 N$ when put in water. The buoyant force is:-
Question 5 :
The density of a substance is $7100 kg m^{-3}$, its relative density is :
Question 6 :
If $S_{1}$ is the specific gravity of a solid with respect to a liquid and $S_{2}$ is the specific gravity of the liquid with respect to water, then the specific gravity of the solid with respect to water is :
Question 9 :
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 10 :
Any solid will not sink in water if its relative density is
Question 11 :
What will be the weight of a body of mass $m$ kg at the centre of the earth?
Question 13 :
_______ of a body changes from place to place but its ______ remains constant.
Question 14 :
Any solid will float in water if its relative density is :
Question 16 :
The weight of a body is $120 N$ on the earth. If it is taken to the moon, its weight and mass will be about (Take g$_e$ = 10 m/s$^2$)
Question 17 :
A stone is attached at the end of a spring balance. The pointer shows 5 kg wt. Now the spring balance is released such that it is free to fall under the effect of gravity, the pointer will now give a reading equivalent to
Question 18 :
Relative density of silver is $10.8$. Its density in $g/cm^3$ is<br/>
Question 22 :
When a body is going upwards vertically the acceleration due to gravity is taken as
Question 23 :
A globe of steel has a mass of 12 g and a volume of $15.2 cm^3$. Find its relative density wrt water.
Question 24 :
A rectangular iron block is placed over a table in different ways such that different faces touch the table. In all these cases, which of the following can be concluded?
Question 26 :
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 27 :
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 28 :
If gravitational mass of a body on the moon be denoted by $M_m$ and that on the earth be $M_e$, then:
Question 30 :
When a solid floats in a liquid, the density of solid is _______ than that of liquid.
Question 31 :
Fill in the blank. If a substance's density is less than one then the substance is _________ than reference.<br/>
Question 32 :
The SI unit of relative density is kg/m$^3$. True or false.
Question 33 :
An object placed on a equal-arm balance requires 12 kg to balance it. When placed on a spring scale, the scale reads 12 kg. Everything (balance, scale, set of weights and object) is now transported to the Moon where the free-fall acceleration is one-sixth that on Earth. The new readings of the balance and spring scale (respectively) are :<br>
Question 35 :
The ratio of the inertial mass to gravitational mass is equal to:
Question 36 :
According to the law of floatation weight of floating body is -
Question 37 :
A boy carries a fish in one hand and a bucket (not full) of water in the other hand. If he places the fish in the bucket, the weight now carried by him (assume that water does not spill) <br>
Question 38 :
State whether true or false:Weight of an object on the moon is ${\frac{1}{6}}$th of its weight on the earth.
Question 39 :
The relative density of a steel ball will be lowest with respect to:
Question 40 :
A block of wood floats in water with $\displaystyle \frac { 2 }{ 3 } $ of its volume submerged. Its relative density is equal to :
Question 41 :
The mass of earth is $80$ times that of moon and its diameter is double that of moon. If the value of acceleration due to gravity on earth is $9.8 m/s^{2}$, then the value of acceleration due to gravity on moon will be
Question 43 :
Given that T stands for time period and l stands for the length of simple pendulum. If g is the acceleration due to gravity, then which of the following statements about the relation $T^2 = (l/g)$ is correct?
Question 44 :
At the surface of a certain planet, acceleration due to gravity is one quarter of that on earth. A brass ball is transported to this planet, then find the percentage change in its weight.
Question 45 :
A mass $M$ is lowered with the help of a string by a distance $x$ at a constant acceleration $g/2$. The work done by the string will be
