Question 2 :
Mass of a body changes at different places on earth. State whether true or false.
Question 5 :
<b>Assertion</b> : The acceleration due to gravity on the moon is one-sixth that on the earth.<br><b>Reason</b> : The law of gravitation is the same on both the moon and the earth.
Question 7 :
What is the mass of an object whose weight is 98 N?
Question 8 :
<br>Specific gravity usually means relative density with respect to ice. Is the statement True or False
Question 9 :
Density of a body wrt water is $\rho$. What is the density of water wrt the body?
Question 10 :
The place where the value of 'g' is unaffected by the increase (or) decrease in the speed of rotation of the earth about its own axis is poles
Question 11 :
Assertion: Specific gravity of a fluid is a dimensionless quantity.
Reason: It is the ratio of density of fluid to the density of water.
Question 12 :
The weight of a person on earth is $600\ N$. His weight on moon will appear as:
Question 13 :
A block of wood floats in water with $\displaystyle \frac { 2 }{ 3 } $ of its volume submerged. Its relative density is equal to :
Question 14 :
A body will experience minimum upthrust when it is completely immersed in:
Question 16 :
The force acting on a mass of 1 g due to the gravitational pull on the earth is called 1 g wt. One g wt equals
Question 17 :
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 18 :
The upward force acting on the body immersed in a fluid is called :
Question 21 :
Which of the following statements about weight is/are false ?<br>$1$. Weight does not change when location changes.<br>$2$. Weight is a force.<br>$3$. Weight is measured in kilograms.<br>$4$. Weight is proportional to the amount of gravity acting on an object.
Question 22 :
A solid weighs $32 g f$ in air and $28.8 g f$ in water. The R.D. of the solid is
Question 23 :
Why does a mug full of water feel lighter inside water?<br>
Question 24 :
How is the acceleration due to gravity on earth surface related to the mass $M$ and radius $R$ of earth?
Question 28 :
State whether true or false:Weight of an object on the moon is ${\frac{1}{6}}$th of its weight on the earth.
Question 29 :
Assertion: To float; a body must displace liquidwhose weight is equal to the actual weight.<br>Reason: The body will experience no net downwardforce in that case.
Question 30 :
A body is heated. What is the effect on its relative density?
Question 31 :
As we go from equator to the poles, the value of g :
Question 32 :
If the weight of a body on the earth is 12 Newtons (N), its weight on the moon will be:
Question 33 :
If the Earth were compressed in such a way that its mass remained the same, but the distance around the equator were just one-half what it is now, what would be the acceleration due to gravity at the surface of the Earth?
Question 34 :
The apparent weight of a body, weighing M kg-wt, during free fall is
Question 35 :
It is given thatA has higher relative density than B. Choose the correct option.
Question 38 :
When a body is fully immersed in a liquid, the loss of weight of the body is equal to:
Question 41 :
Assertion: The weight of an object changes from place to place but not mass.
Reason: The weight of the object is independent of the value of g
Question 42 :
Weight of a body is a scalar quantity. True or false.
Question 43 :
The relative density of a steel ball will be lowest with respect to:
Question 45 :
The mass of a planet is $5$ times the mass of the earth but its diameter is the same as that of the earth. How much work is done in lifting a stone of mass $3\ kg$ through a distance of $1\ m$ on this planet?
Question 48 :
The weight of 50 kg person at the surface of earth is ................
Question 49 :
The weight of a body on the surface of the moon is $\dfrac {1}{6}th$ of that on the earth's surface. It is because acceleration due to gravity on the surface of the moon is six times that on the surface of the earth.
Question 50 :
A body is floating in water such that 6 out of 10 parts of its volume is under water. Its density is
