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In kinemetics, i learnt that as long as you have three unknowns, you can solve the problem. If you know the distance, d; time, t; and final velocity, vf; you can figure out vi.
average velocity = total distance / total time
so d/t = (vi+vf)/2
2d/t = vi + vf
(2d/t) - vf = vi
hope this helped .good luck
Remember that this only works if the acceleration is constant.
-Manvith N
Wiki User
∙ 11y ago
Wiki User
∙ 15y agoIn general case, that cannot be calculated - the velocity during movement is unknown according to data.
It might be calculated only for simple cases, like for example constant acceleration during movement.
If we're considering constant - but unknown - acceleration during movement:
Distance traveled will be:
S = vstartt + at2 / 2,
and final velocity:
vfinal = vstart + at
Substituting second equation into first, we get:
S = (vfinal - at)t + at2 / 2, which is
S = vfinalt - at2/2.
Let's solve for a:
a = 2 * (vfinal / t - S / t2).
Given acceleration, we can calculate vstart:
vstart = vfinal - at
Wiki User
∙ 11y agoinitial velocity is the speed or the velocity at which vechicle or any other objects starts moving.....
Wiki User
∙ 11y agoThis can't be done with just final velocity and time. You need to know the acceleration. If you do know the acceleration, multiply it by the time, and subtract that from the final velocity.
Wiki User
∙ 15y agoThe equation is simple Vi=vf-at
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To find acceleration you subtract what?
To find acceleration you subtract initial velocity from final velocity and divide it by time.
What does initial velocity means?
initial velocity is the velocity with which a particle starts its journey.
Total initial momentum of two objects?
That may vary, depending on the initial velocity and mass.That may vary, depending on the initial velocity and mass.That may vary, depending on the initial velocity and mass.That may vary, depending on the initial velocity and mass.
The equation used to find acceleration is what?
Average acceleration = final velocity - initial velocity/ final time - initial timeOr for short:Aave=Vf-Vi/Tf-TiHope that helps :)
How do you find final and initial velocity?
You use the information you're given, along with the equations and formulas you know that express some kind of relationship between the information you're given and the initial and final velocity.
What is the formula for calculating final velocity when you know the initial speed and the acceleration?
the formula for finding acceleration is final velocity, minus initial velocity, all over time. So if you have the acceleration and initial speed, which is equal to the initial velocity, you must also have time in order to find the final velocity. Once you have the time, you multiply it by the acceleration. That product gives you the difference of the final velocity and initial velocity, so then you just add the initial velocity to the product to find the final velocity.
How do you find displacement when you only have acceleration initial velocity and final velocity?
Kinematics. Final velocity squared = initial velocity squared + 2(gravitational acceleration)(displacement)
When calculating acceleration to find the change in velocity do you subtract the initial velocity from the final velocity?
Yes.
To find acceleration you subtract what?
To find acceleration you subtract initial velocity from final velocity and divide it by time.
How do you find final Velocity of an object?
The final velocity is (the initial velocity) plus (the acceleration multiplied by the time).
How do you find the final velocity given only distancetimeand initial velocity?
v = 2s/t - u where u=initial velocity, v=final velocity, s = distance and t = time
When calculating acceleration to find the change in velocity you subtract the what velocity from the final velocity?
You subtract the initial velocity from the final velocity and divide by the time interval.
How do you find distance with uniform velocity time final velocity and initial velocity?
If the velocity is uniform, then the final velocity and the initial velocity are the same. Perhaps you meant to say uniform acceleration. In any event, the question needs to be stated more precisely.
How do you find the initial velocity given only distance?
You cannot.
How do you find a final velocity without distance but given time?
Without distance, you have to know time, initial velocity, and acceleration, in order to find final velocity.
How do you find acceleration with velocity given?
Use the formula Acceleration = (final velosity - initial velocity)/ time.
How do you find the initial velocity given only the distance and the time traveled?
You can't. You need either the final velocity or the acceleration of the object as well, and then you can substitute the known values into a kinematics equation to get the initial velocity.
