1. What is the Bike Speed Equation?

The bike speed equation estimates speed in miles per hour (mph) from power output in watts and resistance in newtons. It provides a basic calculation of cycling speed based on these fundamental physics parameters.

2. How Does the Calculator Work?

The calculator uses the bike speed equation:

Where:

• \( Watts \) — Power output (W)
• \( Resistance \) — Total resistance force (N)
• 0.621371 — Conversion factor from m/s to mph

Explanation: The equation calculates speed based on the square root of the power-to-resistance ratio, converted to mph.

3. Importance of Speed Calculation

Details: Understanding the relationship between power output and speed helps cyclists estimate performance, plan training, and set realistic goals.

4. Using the Calculator

Tips: Enter power in watts and resistance in newtons. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What factors affect cycling resistance?
A: Resistance includes air resistance, rolling resistance, and gravity on hills. The total depends on bike/rider aerodynamics, weight, tires, and terrain.

Q2: How accurate is this calculation?
A: It provides a basic estimate. Real-world speed depends on many additional factors like wind, road conditions, and bike efficiency.

Q3: What's a typical resistance value?
A: On flat ground, total resistance might range from 5-20N depending on conditions and rider position.

Q4: How does power relate to speed?
A: Speed increases with the square root of power. Doubling power only increases speed by about 41%.

Q5: Can I use this for e-bikes?
A: Yes, but remember e-bike motors have efficiency factors not accounted for in this simple equation.