# 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 formula?

distance travelled or displacement = s, acceleration = a. (4) If final velocity, distance and time are provided then initial velocity is. u = 2 ( s t ) − v.

## What is initial velocity example?

Solved Examples 1: A train is moving through a city with a slow speed. Once outside the city, the train accelerates at 0.40 ms^-2 for 60.0 s. After this acceleration, the velocity of the train is 30.0 ms^-1. Determine the initial velocity of the train.

## 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?

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).

## How do you use velocity formula?

To figure out velocity, you divide the distance by the time it takes to travel that same distance, then you add your direction to it. For example, if you traveled 50 miles in 1 hour going west, then your velocity would be 50 miles/1 hour westwards, or 50 mph westwards.

## 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 .

## What is the initial velocity of the particle?

Q. The initial velocity of a particle is u (att=0) and the acceleration is given by f=at.

## What is 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 the initial horizontal velocity?

The initial horizontal velocity can also be determined by measuring the diameter d of the ball and dividing by the time t that it takes for the ball to move across the photogate. That is Vo = d/t. 7.

## Can initial velocity be zero?

If a car starts from rest, its initial velocity is zero. If a projectile is tossed into the space, its initial velocity will be more than zero.

## 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.

## How do you find velocity when time is not given?

Examine the problem to find the displacement of the object and its initial velocity. Plug the acceleration, displacement and initial velocity into this equation: (Final Velocity)^2 = (Initial Velocity) ^2 + 2_(Acceleration)_(Displacement). Solve the problem using pen, paper and calculator.

## What is velocity Science Grade 7?

Velocity defines the direction of the movement of the body or the object. Speed is primarily a scalar quantity. Velocity is essentially a vector quantity. It is the rate of change of distance.

## What is a velocity in physics?

Velocity is the directional speed of a object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time (e.g. 60 km/h northbound).

## What is velocity in physics with example?

In simple words, velocity is the speed at which something moves in a particular direction. For example as the speed of a car travelling north on a highway, or the speed a rocket travels after launching. The scalar means the absolute value magnitude of the velocity vector is always be the speed of the motion.