Free Fall

A couple days before school started, my friend took me on a hike two ridges over from Aiea. We left early morning so it wouldn't be too hot. To get to the hike you had to walk up a road past a gate. The beginning of the trail was dirt and flat until a point where you had to go downhill through the forest. It had rained the night before so the rocks were muddy and slippery resulting in me eating it at least once d: It was all worth it though. Along the trail were beautiful views, and at the the end we discovered a waterfall which we had to ourselves for about half an hour since we left early.

There were two pools to swim in. The one the waterfall initially flowed into was pretty big and shallow, but at the end the water dropped off a cliff into another smaller pool. You could either swing on a rope into the smaller pool, which i did, or you can jump off the cliff.

Physics is present in both scenarios.

I chose the video of Brian doing a backflip off because it showed free fall which we recently learned about. The force he used to jump gave him an initial velocity in a positve upward direction until gravity slowed him down hitting his peak at velocity of zero. Now he began to accelerate at -9.8m/s2 in a negative direction with increasing speed until he hit the water. If you time how long it takes him to hit the water after he hits his peak it would be possible to calculate his final velocity before hitting the water. Enjoy! :)