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# How To Calculate Velocity In Physics

Although everyone is aware of velocity, there is confusion about it. For example, it's a frequent misconception that speed and velocity are interchangeable; however, this is untrue.

## What is the velocity in Physics:

A measurement of how long it takes an object to travel in a straight line to its destination, velocity is the rate of change in displacement with respect to time. Due to the fact that velocity is a two-dimensional vector quantity with magnitude and direction, it has both. The symbol for velocity, V, stands for meters per second (ms). If students are still unclear about velocity, check out the definition given below, where we compare distance with displacement to help them understand.

Velocity speaks of the speed at which the displacement changes in relation to time. Furthermore, the two main components of velocity are distance and displacement. Additionally, there won't be any velocity if the item doesn't move and there isn't any displacement in its portion.

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What distinguishes displacement from a distance, then? The term "displacement" describes the overall shift in an object's location while it is moving. On the other hand, distance describes the amount of space a moving object covers.

Let's now examine the velocity formula. Velocity is a change in an object's displacement over time, as was previously discussed. Simply said, velocity is a measurement of the amount of time it takes an object to move in a particular direction. Additionally, it has an inverse relationship with time travelled and a direct relationship with displacement. Its measurement is in meters per second (m/s).

### Velocity formula = displacement ÷ time

Displacement = final position – initial position or change in position

Time = taken to cover the distance.

## How To Find Velocity With Distance And Time:

Suppose you know the distance travelled, or the initial and ending positions, as well as the amount of time that transpired during the motion. In that case, you can compute the average velocity by simply dividing the change in position by the amount of time.

However, it would help if you first determined the position as a function of time before taking its derivative with respect to time in order to determine the instantaneous velocity.

V=d/t

Velocity = distance ÷ time.

## How To Find Velocity Without Time:

Kinematics, the part of physics that only analyses the motion of objects, is the subject that most students first encounter when learning about physics. They calculate velocity, position, and acceleration using equations to learn how to use mathematics in the actual world. For example, calculating an object's final velocity while not knowing how long it accelerated is a popular task for students. However, any learner can solve this problem as long as they are aware of the object's acceleration and displacement.

The object's final velocity is defined as the speed it reaches throughout the time before it stops accelerating for the duration.

Let's look at an alternative method for determining final velocity.

If the acceleration is constant, we may calculate the acceleration without taking into account time if we know the object's beginning and end velocities as well as its displacement. Therefore, when determining the final velocity, beginning velocity, acceleration, and displacement, the formula v2=u2+2as is used.

## How To Find Velocity With Mass And Height:

In the middle Ages, people used to think that an object would fall more quickly the heavier it was. Galileo Galilei, an Italian scientist, challenged this idea in the 16th century by launching two metal cannonballs of various diameters from the summit of the Leaning Tower of Pisa. He was able to demonstrate that both objects dropped at the same rate with the help of a personal assistant. All objects close to the surface of the Earth will accelerate at the same rate until they encounter significant air resistance since the mass of the planet is so much more than your own.

To find velocity with mass and height, we need to use the formulas of kinetic energy and potential energy.

Kinetic energy (KE) = ½ * mass (m) * velocity (v2)

Potential Energy (PE) = mass (m) * gravity (g) * height (h)

Kinetic Energy (KE) = Potential Energy (PE)

1/2mv2 = mgh

Mass (m) cancels out

h = ½ * g * v2

v = √2gh

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