Mass from Kinetic Energy Calculator Bullet

Mass Formula:

\[ m = \frac{2 \times E_k}{v^2} \]

Mass (kg):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is a Mass from Kinetic Energy Calculator?

Definition: This calculator determines the mass of an object based on its kinetic energy and velocity.

Purpose: It's particularly useful in physics, ballistics, and engineering to find an object's mass when its energy and speed are known.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ m = \frac{2 \times E_k}{v^2} \]

Where:

\( m \) — Mass (kilograms)
\( E_k \) — Kinetic energy (Joules)
\( v \) — Velocity (meters per second)

Explanation: The formula is derived from the kinetic energy equation \( E_k = \frac{1}{2}mv^2 \), rearranged to solve for mass.

3. Importance of Mass Calculation

Details: Knowing an object's mass from its energy and velocity is crucial for ballistics calculations, vehicle safety testing, and physics experiments.

4. Using the Calculator

Tips: Enter the kinetic energy in Joules and velocity in meters per second. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use?
A: For accurate results, use Joules for energy and meters per second for velocity. The mass result will be in kilograms.

Q2: Can I use this for bullets or projectiles?
A: Yes, this is particularly useful for calculating bullet mass when energy and muzzle velocity are known.

Q3: What's a typical kinetic energy for bullets?
A: Handgun rounds typically range from 500-1000 J, while rifle rounds can be 2000-4000 J or more.

Q4: Why is the result sometimes very small?
A: For high-velocity objects (like bullets), the mass will be small because velocity is squared in the denominator.

Q5: How accurate is this calculation?
A: It's mathematically precise for classical mechanics. For relativistic speeds (approaching light speed), different formulas apply.