1. What is a Joule?

The joule (J) is the SI derived unit of energy. It is equal to the energy transferred when a force of one newton acts through a distance of one meter.

2. How Does the Calculator Work?

The calculator uses the fundamental equation:

Where:

• \( J \) — Energy in joules
• \( N \) — Force in newtons
• \( m \) — Distance in meters

Explanation: One joule represents the energy expended when a force of one newton is applied over a displacement of one meter.

3. Importance of Joule Calculation

Details: Joule calculations are fundamental in physics and engineering for determining work done, energy transfer, and heat generation in various systems.

4. Using the Calculator

Tips: Enter force in newtons (N) and distance in meters (m). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between joules and calories?
A: 1 calorie = 4.184 joules. Calories are typically used for food energy, while joules are the SI unit for all forms of energy.

Q2: How many joules are in a kilowatt-hour?
A: 1 kWh = 3.6 million joules (3.6 × 10⁶ J).

Q3: Can joules measure electrical energy?
A: Yes, electrical energy in joules = voltage (V) × charge (C) or power (W) × time (s).

Q4: What everyday objects have about 1 joule of energy?
A: The kinetic energy of a small apple (100g) falling 1 meter, or the energy needed to lift a 1kg object 10cm.

Q5: How does this relate to power?
A: Power (watts) is energy (joules) per unit time (seconds). 1 W = 1 J/s.