From WarzoneWiki

Warzone's physics engine is relative old compared to modern games' engines, though it's still competitive and perhaps superior to most current RTS games. Acceleration and common properties:

Due to the limitations of hardware in 1999, physics properties are defined constants for different propulsions.

Gravity

This is no 'real' gravity in Warzone, nothing is affected by/takes gravity into consideration when doing collision/move speed calculations, though projectile system uses a fixed constant gravity factor to emulate the trajectory of indirect fire projectile.

'Weight'

All components in Warzone have 'weight', the weight is a factor to determine how fast a unit can run on certain terrain types or how fast a turret can turn.