Nature of Fundamental Forces If you are asked how many types of forces are there on the earth? You certainly will say, many types. If we push anything this is a force, when a truck carries or pulls a load this is a force, when a tree is uprooted due to a strom this is … Read more
Inertia and Concept of Force – Newton’s First Law Newton’s First Law of motion Newton’s First Law of motion can be expressed as – A stationary object will remain stationary and an object in uniform motion will continue its uniform motion unless a force is applied to it. (Since velocity is a vector quantity, for … Read more
a) Pythagoras b) Thales c) Democritus d) Archimedes Answer: b) Thales
What are 3 types of sound? The three types of sound are: Infrasonic: It is a sound with a frequency of less than 20Hz. Elephants use Infrasonic sounds to interact with herds hundreds of km away. Sonic: It is a sound with the frequency between 20 to 20,000Hz. This type of sounds is called inaudible … Read more
a) Solid b) Liquid C) Gas d) All of the above Answer: d) All of the above
What is gravitational constant? The force by which two particles of same mass from a definite distance attract each other is called gravitational constant.
Equations of Motion Initial velocity = u Final velocity = v Acceleration = a Ela[sed time = t Distance = d Formula: 1) s = vt 2) v = u + at 3) v2 = u2 + 2as 4) s = ut + 1/2 at2 If an object has no acceleration hen there is no … Read more
Scalar and Vector quantities What is scalar quantity? Those quantities which only need their value to be expressed are known as scalar quantities. Physical quantities which can be fully expressed by a magnitude only are called scalar quantities. Example: Length, mass, work, energy time, temperature, etc. What is vector quantity? Those quantities which require value … Read more