Home
Back
Rolling Friction Force Formula:
| From: | To: |
Rolling friction force is the force that resists the motion when an object rolls on a surface. It's generally much smaller than sliding friction and depends on the deformation characteristics of the object and the surface.
The calculator uses the rolling friction force formula:
Where:
Explanation: The rolling friction coefficient depends on the materials in contact and the geometry of the rolling object.
Details: Calculating rolling friction is crucial for designing efficient transportation systems, optimizing vehicle performance, and understanding energy losses in mechanical systems with rolling components.
Tips: Enter the coefficient of rolling resistance (typically 0.001-0.03 for tires on pavement), mass in kilograms, and gravity (default 9.81 m/s²). All values must be positive.
Q1: What are typical values for rolling resistance coefficient?
A: Car tires on concrete: 0.01-0.015, bicycle tires: 0.002-0.005, steel wheels on steel rails: 0.0002-0.001.
Q2: How does rolling friction differ from sliding friction?
A: Rolling friction is typically much smaller than sliding friction because it involves less surface deformation and energy dissipation.
Q3: What factors affect the rolling resistance coefficient?
A: Material properties, surface roughness, temperature, speed, and the geometry of the rolling object all influence the coefficient.
Q4: Why is gravity included in the formula?
A: Gravity determines the normal force between the object and the surface, which affects the deformation and thus the rolling resistance.
Q5: Can rolling friction be eliminated?
A: No, but it can be minimized through proper material selection, lubrication, and design optimization.