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# Brittany16's Blog

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## pogo sticks

at one point in everyone's lives they have tried to use a pogo stick (some more successful then others). for starters there is elastic potential energy stored in the spring. which is the work that is done stretching, in this case compressing, the spring. you can find out just how much energy is stored through using the equation PEs= 1/2kx^2. where k stands for the spring constant or the stiffness of the spring and x stands for the displacement from equilibrium. (the difference from the origin

## curling

sticking to my winter sports theme of the night, id like to talk to you about curling. by sweeping the ice in front of the stone, they are removing the ice chips and heating the ice which creates a thin layer of water. this allows the stone to move further because it is decreasing the amount of friction the stone is experiencing. once they get close to the target they stop sweeping, which in turn increases the friction, hopefully enough for it to land on the bullseye.

## 2014 winter olympics

bobsledding is one of the several events held in the winter Olympics. have you ever watched them and wondered what allowed them to stay on the track? well I can answer that question for you. since the bobsled is moving on a path that is the shape of a tube around curves, the mass and velocity of the sled creates centripetal force, which is the force that pulls the object towards the center of the circle, in this case it is what is preventing the bobsled from moving too low or high on the tra

## winter wonderland part 2

so now that I have talked about snow drifts id like to talk about every kids favorite winter activity because of this; sledding. once you make that long hike up to the top of the hill, sit in your sled, and push off, gravity takes over pulling you to the center of the earth which causes you to speed downward. the slope of the hill is what also helps you to accelerate and give you that adrenalin rush as your speeding down the hill and the wind is brushing against your face. as the slope of the

## winter wonderland

For those of you that like the snow because of the fun winter activities that it brings, like skiing, sledding, snowboarding and more, I think you should know what helps to make these things possible; snow drifts. snow drifts are when a gust of wind, which is a force and speed, moves/blows snow and when the wind decreases because it hits an object/outside force, like a hill, the winds speed is decreased. this causes the snow to pile up on the side of the hill. thus making it possible for peop

## the physics of figure skating

so I was trying to think of one more topic to write about and my mom came up with figure skating, which automatically made me think of Casey Carlyle in the Ice Princess. I though of her because for the majority of the movie she was doing a research paper on the physics in figure skating to submit to a college. in doing a little research I found that what Casey discovered in the movie was true. for example, in order for a figure skater to spin at their fastest, they have to compact their body as

## the physics of singing

when someone sings they produce sound waves. these sound waves can tell us a couple of things. in looking at the space or period between the waves allows us to see if a person is hitting high or low notes. also, the high of the waves tells us information about how someone is singing. if the waves are high, then someone is singing in a loud pitch, but if the waves are small/short, then they are singing in a soft pitch. you can also tell if someone is singing harsh or smoothly due to the sound wav

## the physics of a train

well for starters, for a train to begin to move forward, it has to push backwards. (yes, I did say backwards). in doing so it is giving itself enough momentum to move, which falls under Newton's 3rd law of motion. also, since a train is on a schedule that dictates when they have to arrive at a station, they need to be able to calculate how much time it will take them to get there so they know when to leave. they can do this by knowing how far they are going to travel, their acceleration and thei

## the physics of soccer

believe it or not, without physics we wouldn't be able to play soccer. a key component of physics that is involved in soccer would be Newton's laws of motion. for example, for a soccer ball to begin to move an outside force has to act upon it, like someone kicking it. once the ball is moving, it will continue to move until another outside force acts upon it, like a goalie diving for the ball making it hit his/her hand preventing it from going over the goal line. both of these examples show ho

## physics in archery

In archery there is a lot of physics that needs to be calculated correctly in order to have a successful shot. if you are up in a tree stand and you see a deer, you need to know how far away it is, so you can judge if it is a good shot for you to take. to do this you take the displacement from where you are diagonally down to the deer, which tells you how many feet you are away from the tree. also, in shooting from a tree stand, you are shooting down at the deer and need to be able to judge wh

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