Tuesday, December 11, 2018
Rock the Police
The Oyster Incident
Salty water touched the shore as people enjoyed the summer on Tumble Beach, in Brazil. Two brothers played in the water to cool their bodies down, as the sun was particularly hot this day. Wilhelm and Christof jumped and dove through the strong waves always paying attention to not end up too far into the ocean. And so they did, controlling the distance responsibly, not letting the water go past their chest. But as it often is, they forgot to account a simple factor - lateral displacement. Tumble Beach is well known for their underwater holes that act as traps to unaware tourists. More and more to the right, the distracted brothers found themselves deep enough in the water to not be able to step on the beach floor without submerging their heads! And the waves were strong enough to overcome their efforts to swim to safety! Even worse, there wasn't any beach left in that direction, as large rocks filled the shoreline! Wilhelm, whose large body was not prepared to prolonged physical efforts, wasn't able to maintain himself over water for too long, so Christof, who was a lot smaller, pulled him up a few times, as desperation tried to take over. Observing their unusual struggle, a couple of surfers offered help and dragged them both closer to the shore, where they could walk. Phew! Finally this was over and... Whoosh! Tidal waves started to throw them on the rocks! They grabbed and held on, but alas! the rocks were covered in oysters! Sharp inch-long oysters that pierced their skin while the waves threw them around again and again! Now, Christof, stuck in a hole, started to get scared! Wilhelm, climbing over the rock, slicing his flesh on the oysters, tried to save his brother, but it was no use as the waves threw them around as if the sea wanted to claim them back as her own! What would be of the brothers? Here comes the surfers for the rescue again! and Wilhelm let Christof go first, as a lighter body got thrown around more easily by the waves! With their feet on dry sand again, the brothers counted their blessings and ran off to treat their wounds, as their legs were covered by slices and blood, a little reminder of the respect the ocean demanded.
Wednesday, October 31, 2018
Faceplant
A beautiful and warm evening composes the background of the scene as a 7 year-old boy gets home with his mother by bus. As the bus stops and opens its doors, a fire starts to burn in the boy's heart and he jumps off of it, landing perfectly on the sidewalk. The two meter jump feels like a world record on the sparkle from the eyes of a curious little man. This was the first physics experiment of an amateur scientist.
Five years later, the results of that research were all but lost when the now 11 year-old remembers his greatest achievement riding the bus with his mom again. The memory of the thrill comes back to him followed by an unstoppable desire to feel it one more time. On a busy boulevard, trying to save time, the bus driver opens the door a few seconds before arriving at the bus stop. The opportunity is given and the boy jumps from his mother's side towards the freedom of the outdoors! The parabolical trajectory perfectly connects when the jump is done. The young scientist forgot to account for one simple factor: momentum. An object in motion tends to remain in motion and the 20km/h human body connects his face with the asphalt, and continues it's forward trajectory surfing the road with his nose and forehead.
Another experiment with an interesting result: Do not jump off a moving bus.