Why? When it approaches light speed, its kinetic energy becomes unattainable, very large, or even infinite. It results from the fact that no object with a non-zero mass can reach the speed of light. ![]() In the high energy region, there is another important velocity - relativistic velocity. Knowing how to calculate velocity is also of particular importance in astrophysics since results have to be very accurate. Terminal velocity occurs in fluids (e.g., air or water) and depends on the fluid's density. 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. One of the advantages of using this calculator is that you don't have to convert any units by hand. All you'll need to do is type in distance and time. You can, of course, make your calculations much easier by using the average velocity calculator. You can convert units to km/h by multiplying the result by 3.6: 27.8 × 3.6 ≈ 100 km/h.Since the initial velocity was zero, the final velocity is equal to the change in speed.Multiply the acceleration by time to obtain the velocity change: velocity change = 6.95 × 4 = 27.8 m/s.Set initial velocity to zero you're not moving at the beginning of the race.What will be your velocity after 4 seconds? You want to participate in a race with your brand-new car that can change its speed with an acceleration of about 6.95 m/s². Provided an object traveled 500 meters in 3 minutes, to calculate the average velocity, you should take the following steps:Ĭhange minutes into seconds (so that the final result would be in meters per second): It's time to use the average velocity formula in practice. In other words, velocity is a vector (with the magnitude and direction), and speed is a scalar (with magnitude only). The former is determined by the difference between the final and initial position and the direction of movement, while the latter requires only the distance covered. Remember you can always easily switch between all of them in our tool!īefore we explain how to calculate velocity, we'd like to note that there is a slight difference between velocity and speed. In the metric SI system, the units are meters per second m/s and kilometers per hour km/h. British imperial units are feet per second ft/s and miles per hour mph. What is your average velocity? With the velocity calculator, you can find that it will be about 59 mph.įrom the above equations, you can also imagine what are velocity units. 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. You should use the average velocity formula if you can divide your route into few segments. Velocity after a certain time of acceleration:įinal velocity = initial velocity + acceleration × timeĪverage velocity formula - the weighted average of velocities:Īverage velocity = (velocity₁ × time₁ + velocity₂ × time₂ + …) / total time 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. For example, if you drive a car for a distance of 70 miles in one hour, your average velocity equals 70 mph. The average velocity formula describes the relationship between the length of your route and the time it takes to travel. When an object has only angular velocity, it doesn't displace (the distance is zero), and you can't use the average velocity formula. ![]() To learn more about it, head to the speed vs velocity section.Īside from the linear velocity, to which we devoted this calculator, there are also other types of velocity, such as rotational or angular velocity with corresponding physical quantities: rotational kinetic energy, angular acceleration or mass moment of inertia. You have probably noticed that we use words speed and velocity interchangeably, but you can't do it every time. Keep in mind that this velocity formula only works when an object has a constant speed in a constant direction or if you want to find the average velocity over a certain distance (as opposed to the instantaneous velocity). If you want to put this rule down in the form of a mathematical formula, the velocity equation will be as follows: It is one of the fundamental concepts in classical mechanics that considers the motion of bodies. Velocity definition states that it is the rate of change of the object's position as a function of time.
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