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Energy Calculations BBC Bitesize

Kinetic Energy Formula:

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

kg
m/s

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1. What is Kinetic Energy?

Kinetic energy is the energy possessed by an object due to its motion. It depends on both the mass and velocity of the object, as described by the formula KE = (1/2) × m × v².

2. How Does the Calculator Work?

The calculator uses the kinetic energy formula:

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

Where:

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

3. Importance of Kinetic Energy Calculation

Details: Calculating kinetic energy is essential in physics for understanding motion, collisions, energy conservation, and designing safety systems in vehicles and machinery.

4. Using the Calculator

Tips: Enter mass in kilograms and velocity in meters per second. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are the units of kinetic energy?
A: Kinetic energy is measured in Joules (J) in the SI system.

Q2: How does mass affect kinetic energy?
A: Kinetic energy is directly proportional to mass - doubling the mass doubles the kinetic energy (if velocity remains constant).

Q3: How does velocity affect kinetic energy?
A: Kinetic energy is proportional to the square of velocity - doubling the velocity quadruples the kinetic energy.

Q4: What is the difference between kinetic and potential energy?
A: Kinetic energy is energy of motion, while potential energy is stored energy based on position or configuration.

Q5: Can kinetic energy be negative?
A: No, kinetic energy is always positive or zero since both mass and velocity squared are non-negative quantities.

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