There is a lot of physics and math involved when learning with LEGO Mindstorms EV3 robots. It is generally "difficult" to include them directly in the class because students are coming for "something funnier" and at the same time, they could be of different ages. But Inertia is a pretty common topic that is quite easy to introduce to students, especially with a robot.
The robot moves and it stops. What will happen with the cargo when the robot stops. Naturally, the cargo will continue moving and this is dangerous. For how long, what would be the energy. All this are things that could be discussed with this robot.
The robot is not completely finished because you have to finish it and decide on the wheels to be used.