Whena mass moves relative to the reference system within a rotating referencesystem, this movement is deflected. This deflection is caused by the Coriolisforce, an apparent or inertial force. The Coriolis force plays a crucial rolein meteorology and physical oceanography, since it influences the course of airand water currents due to the Earthâs rotation. In engineering, the Coriolisforce occurs when a rotational motion interferes with a further movement of thesame object. This can occur for example in cranes, gearboxes or robots. The experimental unit is designed to clearly demonstrate the effect of the Coriolisforce in a rotating reference system. A transparent water tank with submersiblepump is placed on a rotatable arm and then rotated. Within the rotatingreference system, the pump produces a water jet in a radial direction.Depending on the flow rate of the pump or the water velocity, as well as speedand direction of rotation, the water jet is visibly deflected due to theCoriolis force. The degree of deflection can be determined by means of a scaleon the water tank. The speed is continuously adjustable, electronicallycontrolled and digitally displayed.