Question 1 :
The upward force exerted by a liquid on an object is called _______.
Question 2 :
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 3 :
If the gravitational force of earth suddenly disappears, then which of the following is correct?
Question 4 :
A block of wood floats in water with two-thirds of its volume submerged. Its relative density is equal to
Question 5 :
The upward force acting on the body immersed in a fluid is called :
Question 8 :
The __________ of an object does not change from place to place.
Question 9 :
State whether given statement is True or False<br/>Archimede's principle describes the magnitude of a buoyant force acting on a body that is partly or completely submerged in a fluid.<br/>
Question 10 :
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 11 :
What is the mass of an object whose weight is 98 N?
Question 12 :
A person stands on a weighing machine kept on the floor of an elevator, if the elevator moves upward with a constant acceleration, the apparent weight of the person
Question 13 :
The force with which the earth attracts a body is called its mass. True or false.
Question 14 :
If a body X floats in liquid Y. The density of body X is greater than liquid Y. True or false
Question 17 :
How much would a 60 kg boy weigh on the moon?<br/>Given: $g_{moon}=\dfrac {g_{earth}}{6}$<br/>
Question 19 :
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 23 :
The weight of a person on Earth is 600 N. His weight on Moon will appear as:
Question 27 :
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 28 :
Any solid will sink in water, if its relative density is :
Question 29 :
State whether true or false.<br/>The value of the weight of a body varies from planet to planet.
Question 30 :
If the mass of the earth increases by $80\%$ and radius of the earth increases by $40\%$ then the percentage charge in acceleration due to gravity on the surface of radius of earth is (where $g_{s}=\dfrac{GM} {R^{2}} ,M=$ mass of earth and $R=$ radius of earth})
Question 31 :
A block of wood weights 12 kg and has a relative density 0.6. It is to be of its volume immersed. What weight of a metal is needed if the metal is on the top of wood? [Relative density of metal = 14].
Question 32 :
The mass of a planet is 4 times while its radius is 8 times that of the earth. If the weight of an object is 640 N on earth, what will be its weight on the planet?<br>
Question 33 :
The weight of a body on earth is $98  N$ where acceleration due to gravity is $9.8  \ m  {s}^{-2}$. What will be its weight on the moon where acceleration due to gravity is $1.6  \ m  {s}^{-2}$?
Question 35 :
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 $9.8$ $ms^{-2}$ then the value of acceleration due to gravity on moon will be?
Question 36 :
The radii of two planets are respectively $R_1$ and $R_2$ and their densities are respectively $\rho_1$ and $\rho_2$. The ratio of the accelerations due to gravity at their surfaces is<br><br>
Question 37 :
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 38 :
A rectangular boat floating in water has length 4 m and breadth 1.5 m. A person gets into the boat as a result of w which the boat sinks by 2 cm. Mass of the person is :
Question 39 :
Consider two spherical planets of same average density, Planet 2 is 8 limes as massive as planet 1. The ratio ot the acceleration due to gravity on the second planetto that on the first is.
Question 40 :
For a given length of a pendulum, the time period is maximum<br>
