What is the formulae for velocity?

Answer 1

Below are all formulas for average velocity, which is useless if you have something that has acceleration and/or starts at a certain speed.

The equation for constant acceleration is:

V = V0 + at

Where V0 is the initial velocity (Which can be 0 if the initial velocity is unknown), a is the acceleration and t is the time.

The equation is distance over time!

The equation for velocity is:

V=(Δd)/(Δt)

ΔV-is the velocity

Δd-is the change in displacement

Δt-is the change in time

note that Δd and V are vector quantities so direction is important. Δt.is a scalor quantity so it needs no direction.

e.g.:

Δd=15 km[south]

Δt=30 min

let south be positive

V=15 km[south]/30min

V=0.5 km/min[south]

if needed convert min to sec by multiplying by 60

e.g.:

30*60=1800 sec
v = d / t (or v = dd/dt & v = integral of acceleration with respect to time for physics involving calculus)

where V is velocity, d is displacement (distance traveled) and t is time.

vf = vi + a*t

(vf)^2 = (vi)^2 + 2*a*d

where vf is final velocity, vi is initial velocity, and a is acceleration

v = p/m

where p is object's momentum and m is object's mass

and much much more

Answer 2

Average velocity = change in distance/change in time