Journal 8

This is a picture of my dance team doing turns in one of our performances last year. You can keep these types of turns going for as long as you can maintain stamina and balance. Just like my previous journal, the center of mass must be under my standing leg in order to stay balanced. The other important factor is that the rotation is kept going my the torque applied by the force of my leg swinging around, which is aided by inertia. My extended leg can also be considered the lever arm of the torque. Once I understood these calculations, i realized how i could improve my turning by making sure that i have enough force and the perfect center of mass placement.

Journal 6

These are my friends Laurel and Courtney. We are all in different dance positions with different center of masses. For us to maintain these positions without falling over and losing our balance, the center of mass must be under us. If the center is moved too far forward or backwards, we cant hold these shapes. I didn't realize how much i use center of mass in dancing everyday. Most of our tricks and turns cannot be done without incorporating the law of physics.

journal 5

This summer, my friends and I went to Alan Davis. My friend and I tried doing different jumps, but nothing as crazy as landon and gavin's jumps. This is me just stepping off of the edge and attempting to look graceful in free fall haha. When I am standing on the edge of the log, i have potential energy relative to the water (PE=mgh) but not kinetic (KE=1/2 mv^2) because i am not moving. As soon as i step off the edge, I then have kinetic energy but the potential energy decreases because of the decrease in height. When i hit the water, i have kinetic energy but no potential energy in relation to the water. The total energy when i was standing on the log must be equal to the energy at the end of the jump. It was a lot of fun jumping off the log and free falling was super fun. I don't know how much more potential energy i could handle before i get too freaked out to jump tho!! (no way to spiting caves lol)

Journal 4

HAPPY HALLOWEEN
my picture shows that im happy cuz its more fun than last year (happy like tinkerbell) but a little scared for the rest of the year cuz i hope i can handle it ...and its Halloween

Physics has been a lot more fun than i thought it would be, since i came out of chem hating it. (but this makes a lot more sense) My problem is that i understand it but then on the multiple choice on the test i mess up biggggg time. lol I want to bring my grade up by getting better at those. This is the only class i will stay after the period is done to finish stuff up and its actually fun. Ive been trying really hard to keep up and its makin more sense. (well i think) :)

Journal 3

This is my friend playing pool at Hawaiian Brians. You actually have to be good at using physics (and geom) to do this.. i'm horrible at pool. :] The ball is in a resting state until she uses force to move the ball. By hitting the white ball, she moves it into the state of motion with the net force of her hit. The ball will stay in motion until another outside force acts upon it. You want this to happen when the white ball hits the ball you were aiming for. It will then transfer the energy to the other ball and that ball will continue moving until it is stopped. A different outcome will occur if you do not use enough force. The friction with the table will eventually slow the ball to a stop, which is what makes the ball stop rolling before it hits the desired ball. If you know how to use these facts you might be a good pool player!!!

journal 2

This is my dad windsurfing! Windsurfing is basically all physics. The velocity increases as the board is pushed by the waves' force and the sail is pushed by the wind's force. The velocity increases as you sail down the wave. The acceleration increases as you continue down the wave because the board is moving forward and the change in velocity is positive.
I like windsurfing (even though i don't do it much) and it all depends on how you use the physics!!

Journal 1

This is a picture of Landon and Gavin on a swing when me and my freinds went to the park. They begin on the ground (with their knees up to their chest ;)) and then pull back to gain potential energy. Once off the ground, the velocity increases as they swing higher. When the maximum height is reached, they move backwards with increasing acceleration and increasing velocity. Once at the original position, the acceleration begins to decrease as they swing backwards. If this motion was deamonstrated on a velocity graph, it would have a positive slope ( forward direction, positive velocity) and then at its peak it would change to a negative slope (backwards direction with increasing velocity due to gravitational pull). This will then change to a negative slope because they go in a backwards direction but use the force exerted from their legs to increase velocity. Finally they will be moving in a forward direction with increasing velocity which creates a positive slope.

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