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When a cork and a nail are kept in a beaker filled with water, the cork floats while the nail sinks. What is the reason behind this?

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Important Questions on Physics

EASY
General Studies>General Science>Physics>Mechanics

Which among the following is the correct statement?
A. When an object is thrown upwards, then in any case whether going upwards or coming downwards its speed will remain the same. 
B. The weight of any object cannot be zero. 
 

EASY
General Studies>General Science>Physics>Mechanics
If the velocity of a body is doubled its momentum _____.
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General Studies>General Science>Physics>Mechanics
A force may change ___ of an object. 
MEDIUM
General Studies>General Science>Physics>Mechanics
If two forces 10N and 5N are applied on an object in the same direction, then what will be the total force applied on the object? 
MEDIUM
General Studies>General Science>Physics>Mechanics
What is the rate of doing work?
EASY
General Studies>General Science>Physics>Mechanics
Odometer is used to measure _______:
EASY
General Studies>General Science>Physics>Mechanics
A body of mass 8 kg is moving with a velocity of 4 m/s, find the momentum.
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General Studies>General Science>Physics>Mechanics
When a car starts suddenly from rest, the people are sitting inside the car more backward. This event is an example of:
MEDIUM
General Studies>General Science>Physics>Mechanics
After the explosion of a shell, many pieces fly off in different directions. In such a case, what is conserved? 
EASY
General Studies>General Science>Physics>Mechanics
Which of the following is the kinetic energy? 
a. bullet from the gun.
b. a railway engine at a fast speed.
c. the motion of an ordinary pendulum. 
 
MEDIUM
General Studies>General Science>Physics>Mechanics
How much force will be used to displace an object of 60kg to a distance of 4m? 
MEDIUM
General Studies>General Science>Physics>Mechanics
The angle between displacement and force applied when no work is done is:
MEDIUM
General Studies>General Science>Physics>Mechanics
_____ is caused due to irregularities between two surfaces.
EASY
General Studies>General Science>Physics>Mechanics
For an object, potential energy at a height is known as _____.
MEDIUM
General Studies>General Science>Physics>Mechanics
______ is caused due to irregularities between two surfaces:
MEDIUM
General Studies>General Science>Physics>Mechanics
If a girl weighing 40N climbs up a rope with the force of 160W for 20seconds, then what height will she climb? 
MEDIUM
General Studies>General Science>Physics>Mechanics
As long as an unbalanced force is applied to a body, its continues to change continuously:

 

EASY
General Studies>General Science>Physics>Mechanics

What is the energy possessed by a body due to its motion is called?

EASY
General Studies>General Science>Physics>Mechanics
A body rolling down on a hill has _____:
EASY
General Studies>General Science>Physics>Mechanics

A particle in the medium completes 40 vibrations in 2.5 s. The frequency of the wave is ____: