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SMK930 SMK930
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11 years ago
(and you don't want the initial velocity)
For example, I would have the final velocity, the time, the distance, and I want the acceleration. How do I find it?
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#1
11 years ago
You can use the same equation, but just rearrange it so that the initial velocity is on the left side of the equals sign. Then plug in all of the values on the right side, including final velocity, and calculate initial velocity.

Hope this helps,

-Guru
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juju010juju010
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#2
11 years ago
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#3
11 years ago
1)  Find Vi = 2D/t - Vf

2)  Use Vi (above) in the equation a = 2(d - Vi*t)/t²
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#4
11 years ago
Use both
v = u + at
s = ut + 1/2at2  
Multiply the first equation by t and then subtract it from the second.
Then you get something like, vt ? s = 1/2at2

Substitute values for v,t,s  & Solve the equation .
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#5
11 years ago
Well you have this:  distance d, time t , an final velocity Vf

d/t = average velocity

d/t = (Vf + Vi)/2  implies Vi = 2.d/t - Vf

Vf = Vi + a.t  implies  2.Vf/t - 2.d/t^2  =  a    so   a = 2(Vf*t - d)/t²
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