In this article we discuss the capability of the Xbox Kinect sensor to acquire three-dimensional
motion data of multiple objects. Two experiments regarding fundamental features of Newtonian
mechanics are performed to test the tracking abilities of our setup. Particular attention is paid to
check and visualise the conservation of linear momentum, angular momentum and energy. In both
experiments, two objects are tracked while falling in the gravitational field. The obtained data is
visualised in a 3D virtual environment to help students understand the physics behind the performed
experiments. The proposed experiments were analysed with a group of university students who are
aspirant physics and mathematics teachers. Their comments are presented in this paper.