Table 9 Friction coefficient ∝ for a variety of landscapes
Landscape type | Friction coefficient ∝ |
|---|---|
Lakes, ocean and smooth hard ground | 0.10 |
Grasslands (ground level) | 0.15 |
Tall crops, hedges and shrubs | 0.20 |
Heavily forested land | 0.25 |
Small town with some trees and shrubs | 0.30 |
City area with high rise buildings | 0.4 |