Motion · गति
A free Physics lesson for Class 9 children.
Distance is the total path covered. Displacement is the shortest path from start to end.
Speed is the distance covered in unit time. Its SI unit is metre per second.
Velocity is speed in a given direction, so it is a vector quantity.
Acceleration is the rate of change of velocity. Its unit is metre per second squared.
On a distance time graph, a straight sloping line shows uniform speed.
The slope of a velocity time graph gives the acceleration.
The area under a velocity time graph gives the displacement.