Adição velocidades SR
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The SR Velocity Addition Calculator is an online tool that calculates the resulting velocity of combining two velocities in the context of special relativity. It uses the formula u = (u′+v)/(1+u′v/c²), where u′ is the velocity of the object relative to an observer, v is the velocity of the observer relative to another frame of reference, and c is the speed of light in vacuum.
This calculator operates based on Albert Einstein's special relativity theory, which describes how velocities add up in different inertial frames. The formula accounts for the speed of light as the universal maximum speed limit, providing accurate results for velocities close to the speed of light.
It's essential to use this calculator in situations where the involved velocities are significant relative to the speed of light, such as in particle physics, astronomical problems, or any scenario requiring consideration of relativistic effects. Real cases include calculating velocities of accelerated particles in labs or analyzing motions of high-speed objects in space.
When using the calculator, it's crucial to pay attention to units of measurement and ensure that the entered velocities are valid values, less than the speed of light. Also, remember that the formula assumes velocities are measured in the same frame of reference and direction.
Frequently asked questions
What is the speed of light (c) and why is it important in the formula?
The speed of light (c) is a fundamental physical constant, approximately equal to 299,792,458 meters per second. It is the maximum speed limit in the universe, crucial for calculating relativistic effects.
Can I use this calculator for velocities greater than light?
No, the calculator does not provide valid results for velocities greater than or equal to the speed of light, as this would violate the principles of special relativity.
How should I enter the velocities u′ and v?
Velocities should be entered in compatible units (e.g., meters per second) and must be less than the speed of light.
Is the direction of velocities important?
Yes, the formula assumes velocities are in the same direction. For velocities in different directions, more complex calculations are required.
Can this calculator be used for everyday physics problems?
Generally, no. The calculator is designed for situations where relativistic effects are significant, which is rare in everyday physics problems.