The physics system in Mekside supports joining separately moving block structures with rotating and translating motors, in a similar way as to those used in both industrial robots, hobby R/C kits or toy robotic construction kits. The motor can be controlled either as a servo with a specified desired position as input, or as a free-running motor with a specified speed.

In addition, each motor have outputs that shows the current real position (the set servo position might not be reachable due to obstructions or simply takes some time to reach), the motor load and temperature. These values are also used to produce dynamic sound effects.