# Science Velocity and speed

#### Vishnoo

##### Failure is success if we learn from it.
OP
Member
Can anyone explain Velocity and Speed for me.I really don't understand it?

#### Alkéryn

##### Moon Dweller ~
Member
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

--------------------- MERGED ---------------------------

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

Last edited by Alkéryn,

Member
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?

Alkéryn

#### Alkéryn

##### Moon Dweller ~
Member
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?
No, i'm not (in school) i just like math and science ^^

Member
No, i'm not (in school) i just like math and science ^^
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...

Alkéryn

#### Alkéryn

##### Moon Dweller ~
Member
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...
And also acceleration and shit

Member
And also acceleration and shit
By that point you better have a solid grasp on accelaration since it's one of the first things you're taught.

Alkéryn

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