# How do you find initial and final velocity?

## How do you find initial and final velocity?

Final velocity (v) of an object equals initial velocity (u) of that object plus acceleration (a) of the object times the elapsed time (t) from u to v. Use standard gravity, a = 9.80665 m/s2, for equations involving the Earth’s gravitational force as the acceleration rate of an object.

## What is initial velocity example?

For example, if a projectile is moving upwards with a velocity of 39.2 m/s at 0 seconds, then its velocity will be 29.4 m/s after 1 second, 19.6 m/s after 2 seconds, 9.8 m/s after 3 seconds, and 0 m/s after 4 seconds.

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## What’s the initial velocity?

Therefore, the initial velocity is the velocity of the object before the effect of acceleration, which causes the change. After accelerating the object for some amount of time, the velocity will be the final velocity.

## What’s the formula for final velocity?

Final velocity (v) squared equals initial velocity (u) squared plus two times acceleration (a) times displacement (s). Solving for v, final velocity (v) equals the square root of initial velocity (u) squared plus two times acceleration (a) times displacement (s).

## What is initial velocity on a graph?

In the velocity vs time graph, we plot the velocity values in the y axis and the time values in the x-axis. The initial velocity is the value of the velocity where the time is equal to 0. This means, that the initial velocity is the y-intercept of the graph.

## What is the initial velocity of a projectile?

The initial vertical velocity is the vertical component of the initial velocity: v 0 y = v 0 sin θ 0 = ( 30.0 m / s ) sin 45 ° = 21.2 m / s .

## How do you find the initial value?

In math, an initial value of a function means that it is the y-intercept of the function. One can also find initial values by looking for the constant of an equation. Knowing the y-intercept will help in graph functions. To confirm the initial value, substitute 0 0 in for x x and solving for y y .

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## What are the 3 formulas for velocity?

The three equations are, v = u + at. v² = u² + 2as. s = ut + ½at²

## How do you find initial velocity with acceleration and time?

How do you find initial velocity?
1. Work out which of the displacement (S), final velocity (V), acceleration (A) and time (T) you have to solve for initial velocity (U).
2. If you have V, A and T, use U = V – AT.
3. If you have S, V and T, use U = 2(S/T) – V.
4. If you have S, V and A, use U = SQRT(V2 – 2AS).

## Can initial velocity be zero?

If you choose to start looking when something is already moving, that object will have an initial velocity that is not zero. For projectiles, as Arturo mentioned, we tend to start looking at an object after it has been launched, and already attained some speed, so it has a non-zero initial velocity.

## How do you find velocity with acceleration and height?

Multiply the height by the object’s acceleration due to gravity. The acceleration due to gravity is 32.2 ft/s^2 for English units, or 9.8 m/s^2 for SI units. If you drop an object from 15 feet, for example, you would multiply 15 ft * 32.2 ft/s^2 to get 483 ft^2/s^2. Multiply the result by 2.

## Is the initial velocity the Y intercept?

the”y” intercept equals the initial velocity . when two curves coincide, the two objects have the same velocity at that time. straight lines imply uniform acceleration .

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