Wednesday, February 8, 2023

# How To Figure Out Velocity In Physics

## How Do You Find The Mean Velocity

How to Figure Out Average Velocity for Physics : Fun With Physics

The only data needed to calculate average or mean velocity is the change in position or total displacement, the total time, speed, and the direction of movement. In cases where constant acceleration is also involved, you can use shortcuts to find solutions much easier. Or you can use the average velocity calculator to perform the calculations for you.

Since velocity is a vector, it includes speed and direction. Any quantity that includes a direction are vector quantities. When expressed in equations, you can distinguish vectors from scalar quantities by putting an arrow over the symbol or by using different formatting. Observe this simple example:

v or v stands for speed

v or v stands for velocity or direction and speed

Displacement refers to the change in the objects position. Its the direction and distance between the objects starting and endpoint. Where the object moved through before it reached its endpoint doesnt matter.

Only the distance traveled from the start and endpoints matter. To illustrate this, let us assume that we have an object which moves at a constant speed in a single direction. This object traveled north for 5 minutes, and its constant rate is 120 meters/minute. Lets calculate its average velocity starting with the velocity formula:

v = d / t

To solve for the distance, use the distance formula:

d = v * t = 120 meters/minute * 5 minutes = 600 meters north

v = d / t = 600 meters / 300 seconds = 2 meters / sec north

vav = s / t

## Introduction To Wave Velocity

Wave Velocity is one of the common topics of all the exams that test students on the parameters of physics. Students normally find it hard to deal with this topic as it is a little complex in nature. Although, if studied well, the same topic could be very scoring for the students from exam point of view. To bridge the gap between students and their learning Vedantu has come up with an article prepared by a team of dedicated teachers on wave velocity. Wave Velocity – Formula, Properties, Examples could also be found in the PDF format from the website. The students can download it on their devices and study from the comfort of their homes. The resource is free of cost and doesnt require any prior registration fee.

A wave is a result of external perturbation in a plane surface. We can define a wave as – a wave is a disturbance propagating in space with transportation of energy and momentum from one point to another without transfer of the matter. The most commonly used examples for waves are the ripples in a pond, Sound that reaches us propagates through wave motion, TV signals, etc. The waves are classified into different types depending upon the type of medium, propagation energy, dimensions, and the vibration of particles.

## Problem: Under The Influence Of 3 N Centripetal Force A Ball Attached To The End Of A String Revolves In A Horizontal Circle With An Angular Speed Of 5 Rad S

Given:

Centripetal force Fc = 3 N

Length of cord r = 60 cm = 0.6 m

To find:

Mass of a ball m =?

Solution:

Before finding the mass of a ball, we find velocity.

Velocity in terms of angular velocity is given by:

v = r

Thus, mass of a ball:

m = 0.2 kg = 200 gm

Thus, the mass of a ball is 200 gm.

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## The Concept Is Related To Distance Rate And Time

• M.S., Mathematics Education, Indiana University
• B.A., Physics, Wabash College

Velocity is defined as a vector measurement of the rate and direction of motion. Put simply, velocity is the speed at which something moves in one direction. The speed of a car traveling north on a major freeway and the speed a rocket launching into space can both be measured using velocity.

As you might have guessed, the scalar magnitude of the velocity vector is the speed of motion. In calculus terms, velocity is the first derivative of position with respect to time. You can calculate velocity by using a simple formula that includes rate, distance, and time.

## How Do You Calculate Velocity 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.

Video advice: Finding Force When Given Mass and Velocity

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## The Average Velocity Formula And Velocity Units

The average velocity formula describes the relationship between the length of your route and the time it takes to travel. For example, if you drive a car for a distance of 70 miles in one hour, your average velocity equals 70 mph. In the previous section, we have introduced the basic velocity equation, but as you probably have already realized, there are more equations in the velocity calculator. Let’s list and organize them below:

• Simple velocity equation:
• Velocity after a certain time of acceleration:
• final velocity = initial velocity + acceleration * time

• Average velocity formula – weighted average of velocities:
• average velocity = velocityâ * timeâ + velocityâ * timeâ + …

You should use the average velocity formula if you can divide your route into few segments. For example, you drive a car with a speed of 25 mph for 1 h in the city and then reach 70 mph for 3 h on the highway. What is your average velocity? With the velocity calculator, you can find that it will be about 59 mph.

From the above equations, you can also imagine what are velocity units. British imperial units are feet per second ft/s and miles per hour mph. In the metric SI system the units are meters per second m/s and kilometers per hour km/h. Remember you can always easily switch between all of them in our tool!

## What Is The Formula For Velocity

By: | Updated: Jan 7, 2022

Far be it for us to criticize speeding tickets as a public safety tool , but maybe law enforcement officials should think about renaming them “velocity tickets.”

Allow us to make our case. You see, while the two concepts are related, the words “speed” and “velocity” do not, however, in physics, refer to the same thing.

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## How To Hand Calculate The Average Velocity

How we calculate average velocity depends on which parameters are known and what our frame of reference for the objects motion is. The known parameters will restrict the frame of references that we may choose.

For example, we may only know the distance traveled and how long it took the object to travel that distance. We may calculate the average velocity through that traveled distance by using the formula:vaverage = dtWhere d is distance and t is time.

However, we can calculate a cars average velocity irrespective of time and distance if we know its initial velocity, final velocity, and that it was under constant acceleration. For this, we may calculate the average velocity by using the formula:vaverage = 2Where v0 is the initial velocity and v is the final velocity.

Another common average velocity scenario is with a known initial velocity, acceleration, and time under acceleration. To solve for the average velocity of this object, we may use the formula:vaverage = 2Where v0 is the initial velocity, a is the acceleration, and t is the time under acceleration.

## How To Calculate The Angular Velocity Formula

How to Calculate Velocity

Angular Velocity Formula: In physics, angular velocity refers to how fast an object rotates or revolves relative to another point, i.e. how fast the angular position or orientation of an object changes with time. There are two types of angular velocity: orbital angular velocity and spin angular velocity. Spin angular velocity refers to how fast a rigid body rotates with respect to its center of rotation.

Orbital angular velocity refers to how fast a point object revolves about a fixed origin, i.e. the time rate of change of its angular position relative to the origin. In general, angular velocity is measured in angle per unit time, e.g. radians per second. The SI unit of angular velocity is expressed as radians/sec with the radian having a dimensionless value of unity, thus the SI units of angular velocity are listed as 1/sec. Angular velocity is usually represented by the symbol omega . By convention, positive angular velocity indicates counter-clockwise rotation, while negative is clockwise.

In three dimensions, angular velocity is a pseudovector, with its magnitude measuring the rate at which an object rotates or revolves, and its direction pointing perpendicular to the instantaneous plane of rotation or angular displacement. The orientation of angular velocity is conventionally specified by the right-hand rule.

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## How To Find Final Velocity With Force Mass And Time

As I mentioned that mathematical form of newtons second law of motion for finding final velocity using force, mass and time. Mathematical form of second law of motion is , where m is mass of the object, F is fore working on object and a is acceleration of object.

The equation contains force, mass and acceleration directly.

As we know that acceleration is rate of change of velocity with respect to time.

So, from this formula we can find velocity when mass, force and time is known. If a body is travelling with a variable velocity, which entails a variation in velocity and/or direction, the change is considered to be in this motion.

Newtons second law of motion, which implies how force produces adjustments in motion, addresses this movement. Newtons second law of motion illustrates the numerical link among force, mass, and acceleration and is employed to quantify what occurs in scenarios including forces and motion. The second law is most commonly stated numerically as .

## How Do You Find Final Velocity With Calculator

All you need to do the following:

• First of all, you have to hit the acceleration tab
• Very next, you have to choose the final velocity option from the drop-down menu of final velocity calculator
• Then, you have to enter the value of the initial velocity into the designated box
• Right after, you have to enter the value of acceleration into the given box
• Finally, you have to enter the value of the time into the designated field, then, hit the calculate button, the calculator for final velocity will instantly calculate final velocity for the given inputs

## More Vector Resolution: Trigonometry

Finally, and more often, we need to resolve a vector of known magnitude that forms an angle with the x- or y-axes that is not a 30Ë, 45Ë or 60Ë angle. For that we use simple right-triangle trigonometry, and, if necessary, non-right angle trig.

#### Resolving a vector

Here is a quick example of how trigonometric relationships can allow us to find the x and y components of any vector, as long as the angle of the vector, relative to the axis system, is known. By the way, this idea is completely generalizable to 3-D dimensions.

Consider the vector v rotated 27Ë from the x-axis:

Now we’ll decompose this vector into two component vectors along the x- and y-axes.

Using basic right triangle trigonometry, we can calculate vx:

$$\begin V_x & = v\cdot cos \\& = 25 \cdot cos \\& = 22.3 \ m/s \end$$

Similarly, we calculate vy:

$$\begin V_y & = v\cdot sin \\& = 25 \cdot sin \\& = 11.3 \ m/s \end$$

So if you were standing at the origin, this object would be moving to the right at 23.3 m/s, and upward at 11.3 m/s.

#### Finding a vector from components

When we already have all vector components , it’s easy to find the length of the vector using

$$v = \sqrt$$

where |vx| and |vy| are the lengths of components vx and vy, respectively.

The angle of the vector can be calculated using the inverse tangent function. Let’s use the method to undo our previous example. Take a vector with components vx and vy. Here’s the drawing:

The tangent of the angle is :

$$tan = \frac$$

## Angular Velocity Formula Physics Before we can get to angular velocity, we will first review linear velocity. Linear velocity applies to an object or particle that is moving in a straight line. It is the rate of change of the objects position with respect to time.

Linear velocity can be calculated using the formula v = s / t, where v = linear velocity, s = distance traveled, and t = time it takes to travel distance. For example, if I drove 120 miles in 2 hours, then to calculate my linear velocity, Id plug s = 120 miles, and t = 2 hours into my linear velocity formula to get v = 120 / 2 = 60 miles per hour.One of the most common examples of linear velocity is your speed when you are driving down the road. Your speedometer gives your speed, or rate, in miles per hour. This is the rate of change of your position with respect to time, in other words, your speed is your linear velocity.

Angular Velocity To Linear Velocity FormulaSince most of us are comfortable with the degree measurement of angles, it is convenient that we can easily convert degree measure to radian measure by multiplying the degree measure by pi / 180. For example, a 45 degree angle has a radian measure 45 , which is equal to pi / 4 radians.

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## When Is The Average Velocity Zero

For instance, if a remote-controlled car is racing from Point A to Point B and back to Point A, there is no overall car displacement. In that case, the speed of the car can be measured but not its velocity. If the same car moves from Point A to Point B and stays there, there is definite displacement in a certain direction. It can be measured in such cases. In simpler words, average velocity is just the average speed with a direction. If a trip starts and ends at the same point, the total displacement is zero, so the average velocity is zero.

Here is a video that provides a detailed explanation of average speed and average velocity with animations!

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## How To Calculate Mass From Force And Velocity Using Centripetal Force:

When a body moves in a curved route, centripetal force exerts on it, which has an inward direction, or we might say towards the center. The centripetal force which acts on a body moving along a circular path of radius R is given by:

.

Thus, the mass of an object moving on a circular path is given by:

.

Here, Fc is used for centripetal force.

This is how the mass of an object moving on a circular path can be calculated using centripetal force, velocity, and the radius of the path.

## Terminal Velocity Escape Velocity And Relativistic Velocity

Velocity is present in many aspects of physics, and we have created many calculators about it! The first velocity is the so-called terminal velocity, which is the highest velocity attainable by a free falling object. Terminal velocity occurs in fluids and depends on the fluid’s density. You can read more about it in our free fall with air resistance calculator.

Knowing how to calculate velocity is of particular importance in astrophysics since results have to be very accurate. If you’re interested in the world of massive celestial objects like suns or planets, visit our escape velocity calculator or orbital velocity calculator. You can learn a lot there!

In the high energy region, there is another important velocity – relativistic velocity. It results from the fact that no object with a non-zero mass can reach the speed of light. Why? When it approaches light speed, it’s kinetic energy becomes unattainable, very large or even infinite. You can check it with the relativistic kinetic energy calculator by filling the velocity field with the speed of light 299,792,458 m/s or 2.998e8 m/s in scientific notation. Moreover, this is a cause of other phenomena like relativistic velocity addition, time dilation, and length contraction. Also the Albert Einstein’s famous E = mc2 formula bases on the relativistic velocity concept.

## How To Calculate Mass From Force And Velocity Using Third Kinematic Equation Of Motion:

Total final velocity for projectile | Two-dimensional motion | Physics | Khan Academy

The following is the third kinematic equation of motion:

It shows the relationship between the initial and final velocity. We may now apply Newtons Second Law ) to this equation and obtain:

v2 = u2 + 2d

v2 u2 = 2d .

Thus, using the third kinematic equation, the mass of an object can be calculated as follows:

.

If you know the distance travelled by an object when its velocity v varies from its initial velocity u as a result of force F. In that instance, we can use the third kinematics equation of motion to calculate its mass.

## How To Find Final Velocity With Momentum

By using equation of momentum that is , where m is mass of object, P is momentum of object and v is velocity of object.

This equation contains mass of object and velocity of object. An expression like the above might be thought of as a question-solving technique. It is possible to determine the last variable in the formula by having the integer data of all but one of the variables in the formulae.

An expression might likewise be thought of as a phrase that explains the meaningful relationship between two variables. In an expression, two variables can be viewed of as either linearly correlated or inversely related. Both mass and velocity are directly proportional to momentum. With the velocity remaining constant, an increase in mass will lead to an increase in the amount of momentum carried by the item.

Accordingly, an increase in velocity would lead to an increase in the items momentum. We can forecast how well a change in one variable will affect the other by considering and calculating proportionally about quantities. Momentum is a vector element that has a magnitude as well as a direction. The momentum vector usually travels in a similar path as the velocity vector.