# KC12

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## Physics of Playing Guitar

When one plays a guitar, it is so important to remember all the physics behind it. Waves have a lot to do with the sound we hear from them. For example, without a large amplitude, it would not be heard. And when one changes notes, it changes the frequency that is heard. Because the wave is longitudinal, it needs a medium to travel through which is why in a vacuum you would not be able to hear someome playing. The pulses vibrate parallel to the wave because in a longitudinal wave thats their path

## Physics of Working Out

Working out is a vital part of a healthty lifestyle and I always wondered how much physics is involved in it. Working out takes a lot of work because work equals force times distance. The amount of work I put in is based on my force and distance. For example, when I lift weights, the heavier the weight and the higher distance I lift, the more work I put in. Also, an important part of working out it doing cardio. I like to run fast so I need my velocity to increase. Average velocity equals dis

## Physics of Tubing

Now that the nice weather is here I thought it would be appropraite to talk about my favorite summer activity, tubing on the lake! The best part of tubing is when your holding on for dear life and are going so fast the water splashes everywhere and then you take a big jump off a huge wave! But beyond just having fun there is a lot of physics involved. First, momentum is a huge part of tubing. Momentum is the product of an objects mass (me) times its velocity. This explains why I have so much

## Car Collisions

When a car accident occurs, how can scientists see the change in momentum? After two cars collide and become connected, how is it possible to find the mass, momentum or velocity of either car? Simple, the conservation of momentum. If the vectors of before the crash and after are added up, they will equal each other. This can be written in an equation as: P-initial=P-final This is directly related to Newton 3rd Law, which justifies that all gorces come in pairs. But this is not the only phy

## Physics of Modeling

I've always wondered why models are so skinny. Beyond fitting the designers clothes, there really seemed to be no point in forcing them to be so thin. This thought made me wonder, is there any other benefit to being so thin, do they move faster down the runway and do they have more momentum? Then I realized, this is a physics problem! So how could I test if skinny models move down the same length runway faster and if they have more momentum, which is what lead me to two basic physics equations

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