Can anyone explain Velocity and Speed for me.I really don't understand it? Whats really the difference.Googled it,But i don't get a definite answer.

Speed is scalar, velocity is vectorial in "easy" words speed is the quantity of distance units per time units while velocity is speed plus a defined direction and sense — Posts automatically merged - Please don't double post! — Example an object that is mooving at a speed of 7 kmh can have an horizontal velocity of 5 km/h, a vertical velocity of 5km/h and a Z velocity of 0 km/h (By Z i mean the 3rd axis of a 3d space) EDIT: I didn't made the calculation for units, so the units I gave migth be wrong scince i made it in my head and it is just an example xD

I'd like to add that if you have the velocity, you can find the speed by squaring the components, adding them up, and then taking the square root. Are you doing partial derivatives?

I was wondering if OP was doing them because that's where you use this stuff. After partial derivatives comes surfaces and then cylindrical and spherical coordinates and then vector fields and more crazy stuff. Oh man, I'm getting stressed out and I already passed that stuff...

By that point you better have a solid grasp on accelaration since it's one of the first things you're taught.