What is the equation for finding acceleration due to gravity?

Question

in other words, what does g equal? is it something like g=1/2*v*t^2 or something???

Answer 1

it depends on what variables you know.

for example

d = Vot + 1/2 a t^2

if you know d, and drop an object at rest and measure t, then...

d = 0 x t + 1/2 a t^2
d = 1/2 a t^2
a = 2d/t^2

a, by the way is acceleration. in the special case of gravity, a = g

g does not ever = 1/2 v t^2. the units would be m/s x s^2 = mxs

g has units m/s^2

Answer 2

Near the surface of the Earth, you don't need any equation at all. The acceleration of gravity is simply 9.81 meter/second^2.

Answer 3

there is no equation, just a constant (I suppose it does vary ever so slightly with distance from sea level)

g=9.81 m/s/s (m/s^2)
(I think more accurately it is something like 9.80655.

there is another equation for velocity after the passage of time under a constant acceleration, is that what you mean?

Answer 4

9.8m/s^2 or in terms of force is 9.8 N/kg per 1 kg