We got the speed of rotations of the motor in Radians per second. Let's calculate the value for the speed of the whole system. We calculate that the wheels are rotating with 375 radians per second. Which is impressive and quite fast for this system. From this speed, knowing the inertia mass we can calculate how much energy is the system accumulating.

### To access the full video please subscribe to FLLCasts.com

**#116**- 22 Nov 2015
- 6:49

The shown problem is very valuable for different STEM classes. On the stand we have three wheels that contribute to the mass of the system. We calculate the energy for one of the wheels and then for two and for four. We can conduct different experiments with different masses and get the different energies.

More about gears you can learn at:

### How to on gears

Previous video tutorials: