The resistance provided by surfaces that come into touch with each other when moving across is called friction.
Uses of friction:
Whenever matchsticks are lighted, friction is used.
The movement of pistons in a cylinder is an example of friction.
Because there is friction between the pen and the boards, it is better to execute on textbooks and board.
Motion:
Motion is defined as a modification in an object's location with regard to time.
Motion can be seen in a book dropping off a table, water running from a faucet, rattling windows, and so forth.
Therefore, Galileo said that throughout the elimination of resistive forces like friction, even when an item is given a set velocity, this should retain that velocity indefinitely.
