What is force

 We do so many activities in our daily life 

like, opening a door, kicking a football, striking 

a carrom coin etc., To do these activities an 

external agency is needed. This external agency 

is called force. Force can either set an object at 

rest into motion or bring a moving object to 

rest. It can even change the shape and size of 

certain objects.

Force is defined as an external agency 

which changes or tends to change the state of 

rest or the state of uniform motion of a body 

or the direction of a moving body or the shape 

of a body. Force is a vector quantity, which has 

magnitude and direction. It is measured by a 

unit called 'newton' (N).