Theory:

Every day you can observe force around you. When you walk from school to home, before entering you should open the closed door by pushing the door, while you get up from the school desk, you are pushing yourself against the desk, to make breakfast, your mother will apply force to make chapatis.
While you bat in a cricket/ baseball match, to hit a ball to the boundary, you have to apply force on the ball using the bat. When you want to win a cricket match, you need to hit more number of sixes and fours for that you should hit the ball with more force. Then only you can win the match.

 baseball.jif
 
Force can be defined as something that tends to change the shape and state of a body, that is if a body is at rest, by applying force it can be changed to moving state, it can also change the direction in which a body is moving. It is measured in terms of newton.
 
Observe the picture below, in which a man is squeezing a lemon.
yellow-citrus-fruit-squeeze.jpg
He applied force to squeeze the lemon.
Compare the shape of the squeezed lemon with the  un-squeezed lemons besides the plate of fried fishes. It is largely changed in shape.
If force is applied, materials may change in shape.
 
Observe this picture, in which a man is pushing the tyre.
pushing tyre.jpg
What will happen to the tyre?
It will move from one place to another.
If force is applied, materials can be moved from one place to another.
 
Force can...…
Change the states of the body from movement to rest
Change the states of the body from movement to rest from rest to movement
Alter the speed of the object
Change the shape of the object
Change the direction of the movement
 
 
 
 
Reference:
Baseball image : Free image  from https://pxhere.com/en/photo/539659 (License : CC0 Public Domain)
Man pushing tyre :https://www.pxfuel.com/en/free-photo-euksc (License :  Creative Commons Zero - CC0)
squeezing orange: Free image from https://www.peakpx.com/537312/man-squeezing-citrus-on-top-of-fried-fishes