## How Does the WOO Work? (in detail!)

Recording your jumps with WOO is simple (almost too simple!??!). Pop the WOO on your board, put it in record mode, and you’re good to go. So what’s going on under the hood of the WOO to measure your jumps?

The WOO is designed to take advantage of one wonderful universal truth about the earth: everything is being pulled to its surface by gravity. Gravity on earth is a constant - 9.8 m/s/s - and because of this, we can measure how fast something is accelerating towards and away from earth by measuring the acceleration acting on it using an accelerometer (one of the sensors found in the WOO). For example, when something is in free-fall and experiences “weightlessness”, that means that it’s falling at exactly earth’s gravity and 0 acceleration is being felt. Alternatively, when something is shot into the air, the object is feeling earth’s gravity PLUS the force of the acceleration upwards.

So what does this have to do with WOO? The WOO measures all your jumps by tracking acceleration relative to gravity. When you jump off the water, the WOO sees your gravitational forces change, and using this data it can determine exactly how high you traveled upward and downward. This is the WOO “Algorithm” in action!

Remember back in calculus & physics class how acceleration, speed, and position are related? If you track acceleration of an object over time, you can integrate that acceleration to determine change in position. That’s exactly what the WOO does, using an accelerometer to measure the values, and a gyroscope to make sure your values are in the correct direction.

The end product is WOO that knows when you take off, how far you travel up and down on your jump, and can average the distance up and down to give you a jump height score!

One common question we get is: wouldn’t the WOO get confused by horizontal forces, like during a kite loop? Since the WOO is looking for only vertical acceleration using the accelerometer and gyroscope, the answer is no. The WOO sees this horizontal acceleration, but it does not use that data in determining jump height.

Have another question? Hit us up in the comments below!

Cheers,

Leo (WOO C.E.O.) & Patrick (WOO C.T.O)