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# Amanda's Blog

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### About this blog

Physics of Walking a Dog

## Thunder and Lightning

Ever since I was little, I've been interested in thunder and lightning. The lightning would always crack across the sky and that would be followed by a boom of thunder. When i was young, I neve knew why these things happened or anything about sound and light. But now as a student of physics, I know some interesting facts about these occurances. Light and sound are both a very big part of our everday life. Without them, life would be very different. Light travels faster than sound. That's why

## The Wonderful World of Sound

Music is such a big part of my life. I honestly cannot imagine what life would be like without it. Suprisingly, I guess I have physics to thank for the music that makes life so great. Without waves, more specifically sound waves, we wouldn't be able to hear music. Or really any sounds. Sound waves are longitudinal waves. In a longitudinal wave, the medium is moving in parallel of the direction that the wave is going. They're also mechanical wave. That just means that they require a medium to

## The Physics of Wagon Pulling

My neice, Emma, is only a couple months old, but she already has a lot of stuff. Clothes, toys, books, even a little blue wagon for when she gets older. Probably in five plus years she'll want to drag that thing around all summer. But I'm not so sure how easy it would be for her to do that. How much work would she have to put into that action? Well to figure out work, you can do W=Fd, W=mgd, or W=Fcos(-)d. I'd probably use W=mgd so I don't have to measure angles or anything. Let's say the

## The Physics in Blowing a Fuse

You know when you're in the bathroom and you're running the blow dryer, the space heater because it's winter, and then you decide to plug in your phone to charge? And then all of a sudden everything will shut off and make you really angry? Well, all the power/electricity they were using in the bathroom caused the ciruit to blow. Then you'll end up having to go in the basement and reset the fuse box. Each room in your house has some sort of circuit setup for the electricity to run through. And

## Inertia

Newton's first law can also be called the law of inertia. It pretty much means that unless there is an unbalanced force on an object, it will continue doing what is doing whether that be moving or staying still. This law is difficult to see on Earth because we have this stupid thing called friction so things that are moving will eventually stop. Inertia is an objects tendency to resist a change in velocity. Let's say my dog Cujo (who seems to be the subject of a lot of my blog posts) was 25 k

## The Physics in Carrie

You know how in the movie Carrie, they pour paint on her when she gets on stage to recieve her crown? Well how do they time this correctly? I guess they had to use physics to find out how long it would take the paint to hit the girl. Mind you that the original movie was way better than the most recent remake...but we'll ignore that for now! So anyway, let's say that Carrie was 4 meters below the rig above the stage, all they would have to do is solve for the time to see how long it would take

## Collisions in Sledding

I think Winter is a great season. It's full of warm clothes, family, and lots of fun seasonal activities. It's also full of freezing temperatures, wet snow, and boots that can't keep your feet dry. While I've never attemped snowboarding or skiing (because of my total lack of coordination) I do enjoy sledding. Yes, it makes me feel 5 again, but I think it's something that you can enjoy at any age. Ley's say that Jake, a 60 kg boy has just gone down a hill on a sled and has stopped at the bottom

## The Speed of a Dropped Ball

Playing a game of fetch with my dog is always entertaining. He'll always run after the ball, but he never likes to drop it once he has brought it back. If I wanted to find the speed at which the ball hits the ground once he has dropped it, I can use either kinematics or the formula for energy. Let's say that my dog, Cujo, drops the ball from a height of 3 meters. We would start by setting the potential energy of the ball in his mouth equal to the kinetic energy of the ball once it has hit the gr

## The Work in Moving

I am moving a friend into her new house pretty soon. As many know, moving involves a lot of lifting, carrying objects, and rearranging many times. Work is the process of moving an object by applying a force to it. Let's say that we're trying to move the TV which weights 22 kg onto a TV stand that is 3 meters above the floor. To find the work done on the TV, you would use the formula W=Fd, which can be changed into W=(m)(g)(d). So to solve for work you would plug in your units and it would look l

## Physics of Crowd Surfing

So, I like going to concerts and something that I usually see is crowd surfing. Crowd surfing is definitely a thrill, buts it's interesting how you can find physics in anything; like crowd surfing at your favorite band's concert. Crowd surfing can be a tricky thing to maneuver. You have to consider mass and some forces like gravity. When you're crowd surfing, you're being held up by the other concertgoers. You have to make sure that they can support you; after all their hands can only hold up

## Physics of Driving a Car

It's usually about this time in high school that everyone is practicing driving and getting their licenses. Physics has an astonishing amount of influence on driving, even if we don't think about it. When you step on the gas, your car is accelerating. And you can measure your velocity when you look at your speedometer measured in MPH. Something that I think we all fear is the possibility of getting into a car accident. Say you're involved in a head on collision with a car going 70 mph, while

## Physics of a Halloween Party

Halloween is my favorite holiday and I recently threw a Halloween party at my house. But for the safety of my animals, my two cats were to spend their night in the basement. The two didn't really enjoy being lightly tossed into the basement. Now, if you had ever met these cats you would understand why getting them in the basement is tricky; the little buggers are fast!! Anyways, the force with which they were tossed was definitely not extreme nor was their velocity, so don't get PETA on my ca

## Physics of Walking a Dog

Just like any other dog, my dog Cujo loves to go for walks. The only problem being that half the time he ends up running after something and I get dragged along for a couple seconds. I never really thought about it before, but Physics can explain a lot of the things that occur when Cujo and I go for our walks. When we are traveling at a normal pace, I can determine our average velocity by taking our distance and dividing it by how long we have been traveling. But what if Cujo happens to see t

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