How do you find velocity from acceleration, mass, and distance?

Question

acceleration = 9.8 m/s^2

mass = 0.08 kg

distance = 6 m

what is the velocity of the object at the 6 m point? (I don't think mass should matter)

Answer 1

You have a formula in your text book plug in those numbers, you spent 100X more time asking about this.

V1 (initial is 0)

Answer 2

Basic formula

Df = Di + Vi*t + 1/2*A*t^2

Where

Df= the final displacement

Di = initial displacement

Vi = initial velocity

A = acceleration

t = time

ASSUMING that it starts at an initial displacement of zero and an initial velocity of zero this gives us

Df = 1/2*A*t^2 or that

t = Sqrt(Dtot/{1/2*A})

Plug in your given distance for Dtot and your given acceleration for A to get "t"

Now that you have t, you can get the final velocity from that

Vf = Vi + A*t

Where again

Vf = final velocity

Vi = initial velocity

That's pretty much everything besides actually plugging in the numbers.  You're correct in that mass doesn't matter here.

Answer 3

Well, if you look at the definition of acceleration, it says the amount of increase in speed per second. 9.8 m/s^2 means the mass is increasing 9.8 m/s every second. We need to know the initial velocity however. That fact is very important. In most cases it's just 0 though, but never assume. Anyways, use this handy little formula (it should be in your book).

v^2=vinitial^2 + 2*acceleration*distance

Answer 4

you need a time at which the object took to get there