FTW IS WTF SPELLED BACKWARDS

This past martin luther weekend I went to the beach and i went to the brians and i played wow and halo and i got to like come sort of corporal class or some thing like that, idk. You may wonder what I’m going to talk about in this journal. The answer: skimboarding.

So skimboarding. pretty good. idk, it’s far less awesome than body boarding but its still kinda fun. There’s a litte physics in it. Friction and other stuff happens. First you accelerate to a high velocity, then at the peak velocity, you put your board on the sand and jump on it and slide until you get owned by a wave or a rock or a person in your way. While you’re on the board, 2 forces act on you, friction and gravty. The friction is in the direction opposite of your movement and it decelerates you. The board and the sand has a high coeff of kinetic friction, but when the sand is wet, it gets much lower and you can slide for long distances, depending on the beach terrain. Its important in timing because you don’t want to have a lot of water to slide on because you don’t go far, but you don’t want too little because you slow down too quickly. So, timing when to slide inbetween the ebbs in the tide is important. Speaking of tide, there’s another physics thing: gravitaitonal pull. When there’s a full moon, I heard that waves get bigger by a little bit because the moon pulls more on it or something… huh… wait… what? is that true?

To show that I didn’t forget everything from Physics because of the vacation:
“Put the fulcrum at one of the unknown forces to cancel out a variable.”

haha. and that’s about all I remember. Oh. Rotational Inertia changes depending on what type of object is spinning and there’s like 5 or so different equations for like… a sphere and a pancake and other shapes.

During this break there was a lot of physics related things happening. I’ll try to remember. Oh. I went to lift weights like 3 times a week or so during the vacation. And on several machines, the metal plates add more mass to the bar. So then when the bars are lifted, the person lifting uses more energy. This is because there is a greater change in energy: PE = mgh. The mass increased, so more PE. The change in energy comes from the amount of PE put into the bar with weights. Initial PE is 0 if the reference level is the ground, and final PE is mgh… I think. I’m not even fully sure this is correct anymore.

As for torque, well. Y’know, like bicep curls. Those own. Your elbow is the point of rotation and its like BOOM ow my bicep! cuz you’re like all working out and all good stoof like that.
Also theres pull overs where it works your triceps and your elbow’s the focal point and its like the weight’s over your head. and it hurts your triceps.
Also there’s those hamstring things: you’re lying down on your stomach and your knee is the rotation point and the weight is on your ankles and you’re trying to bend your knees but it’s reel hard and you’re like “ah im cramping!” Those hurt. I have real weak hamstrings and calves for some reason. So junk because it hurts real bad after cross country practices. But, not so much anymore since xc ended and track is far away, like in the beginning of february. Good thing it’s still… oh man. january. AHH NO.

Oh man. I’m looking damn beefy in this picture.