Why the earth is rotating along its axis?

[LURCH]

or what type of forces made Earth rotating around the earth?please answer me in detail i m in very biggest trouble

Think about what happens when you pull the plug from a tub of water. Water from all directions rushes toward the drain, and the forces that the center of the drain are not perfectly symmetrical. That is to say, not all of the water molecules collide with one another "head-on." Some will pass by one another slightly to the left or the right.

Eventually, slightly more particles will pass to one side than the other. This on even force causes all the water around the drain to begin spinning in one direction. This is essentially what happened to the collapsing cloud of dust and gases that eventually formed the earth. Gravity caused them to collapse rapidly, rushing quickly toward a central point, and slight imperfections in the symmetry of the collisions made them spin.