Kinetic Energy Calculator

Kinetic Energy Formula:

\[ KE = \frac{1}{2} \times m \times v^2 \]

Kinetic Energy (J):

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1. What is Kinetic Energy?

Definition: Kinetic energy is the energy possessed by an object due to its motion.

Purpose: This calculator helps determine the kinetic energy of moving objects, useful in physics, engineering, and safety calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ KE = \frac{1}{2} \times m \times v^2 \]

Where:

\( KE \) — Kinetic Energy (Joules, J)
\( m \) — Mass of the object (kilograms, kg)
\( v \) — Velocity of the object (meters per second, m/s)

Explanation: Kinetic energy increases with the square of velocity, meaning doubling speed quadruples the energy.

3. Importance of Kinetic Energy Calculation

Details: Understanding kinetic energy is crucial for vehicle safety, sports science, mechanical engineering, and physics education.

4. Using the Calculator

Tips: Enter the mass in kilograms and velocity in meters per second. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What are the units of kinetic energy?
A: The SI unit is Joules (J), where 1 J = 1 kg·m²/s².

Q2: How does velocity affect kinetic energy?
A: Kinetic energy increases with the square of velocity - double the speed means 4× the energy.

Q3: What's a practical example of kinetic energy?
A: A 1000 kg car moving at 20 m/s (72 km/h) has KE = 0.5 × 1000 × 20² = 200,000 J.

Q4: Can kinetic energy be negative?
A: No, since both mass and velocity squared are always positive.

Q5: How is this different from momentum?
A: Momentum (p = mv) is a vector quantity, while kinetic energy is a scalar that depends on velocity squared.