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When I am rock climbing, I can use calculus to calculate how far I am going to fall at a certain point.

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Skiing is one of my favorite things to do. You can use calculus when hitting a jump by taking your current velocity, and the angle and height of the jump to estimate where you will land

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Watching soccer is one of my favorite activities, and when a player is taking a freekick, you can use calculus to not only measure the velocity of the ball when shot, but also with the launch angles and velocity, predict how and where the ball will travel.

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In order for games to have realistic or functioning physics calculus is needed in order to be internally consistent and appear realistic.

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I love playing tennis, by using calculus I can calculate the velocity of my serve by measuring how far the tennis ball traveled divided by the amount of time it took for the ball to travel that far.

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I really enjoy go karting and you can use calculus to find the accelaration of different people on the track based on their velocity

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I go hiking alot and calculus can help estimate how long a hike will take based on your current velocity.

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I love to play tennis, and by using calculus I can calculate the velocity of my serve by looking at how far the tennis ball travels divided by how far it traveled.

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I enjoy doing hapkido which is a type of martial arts. In it, you do a lot of kicks and rolls, which you can use calculus in order to visual the kicks on a graph.

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I do a lot of long runs for XC training, and calculus is very helpful to help me estimate when I will finish at even if I gradually slow down over time being able to model acceleration and velocity and integrating to find time.

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I love to sing, and calculus is present in music because sound waves are the pattern of disturbance caused by the movement of energy traveling through a medium. Sound waves can be measured for frequency, amplitude and period just like sine and cosine graphs.

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I love to dance and a very popular dance step is called a saut de chat, where a ballerina leaps through the air and aims to hit a full 180 split at the peak of the jump. Using calculus, you can visualize the jump as a function that can be plotted on a graph, because the leap moves in both the x and y directions.

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I enjoy hiking and walking with my family. When hiking, you can use calculus to calculate the average speed that you were hiking, and see how things like your instantaneous speed change throughout a hike.

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I play spikeball often because it's super fun! It's a high speed game of constantly rotating around the net and switching between offense and defense, hitting the ball into the net and passing to your partner. Using calculus, the launch angle and velocity of the ball, you can make predictions on where the final position of the ball will be and anticipate this by running to the spot to give yourself time to make a good hit.

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II enjoy going places and seeing National Parks. Normally the way I do this is by going on a road trip. I could use calculus to find average velocity. I could calculate how long it should take me to get to my destination. It could also show the difference between average velocity and instantaneous, because those are way different when you are sitting in traffic.

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I like to drive my car fast and go drifting. You can use calculus to derive equations to find distance traveled in a certain time, the acceleration at certain point of time and the velocity at a certain point in time.

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I love to ski. My all time favorite winter activity and makes the winters much more enjoyable. Calculus can be used in many different places for skiing. It can be used to calculate the velocity and acceleration of a skier and much more.

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I love to sleep! It is one of my top ten favorite things to do! You can use calculus to measure how long you are in each stage (light, deep, REM) and the rate at which you transition from one to the other in order to optimize your time in each stage.

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I really like to play music, and there is a lot of calculus hidden in music. All sounds made are actually invisible sound waves, and calculus can be used to determine the height, period, and frequency of those waves, telling us what the sounds actually... sounds like.

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Video games aren't my favorite activity but it is fun to finish a game. You feel like you completed something amazing. Like all the hours spent were worth it. Calculus was and can be used to find the maximum height of my jump and my speed at different points so I know where I will land. It helps me parkour knowing how far my character can physically jump.

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Roller Coasters are probably one of my favorite things. That feeling when you plunge down and then back up is great! I love Disneyland (Aileen you know what I'm talking about), Silverwood, and I really want to go to Six Flags some day. Calculus allows roller coaster and ride designers to determine the maximum height of the attraction without jeopardizing the safety of the riders.

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I love to go on roller coasters - the Washington State Fair and Disneyland are probably my favorite places in the world. I love the feeling of your heart dropping to your stomach for some weird reason. Calculus can be used to determine the maximum and minimum height of my trajectory and my velocity and acceleration at certain points on the ride!

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I have a pool in my backyard so I went swimming a lot this summer! You can use calculus to calculate your velocity and acceleration while you swim based on how far you swim and the time it takes you to  swim there.

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I love to go kayaking with my friends and family in rivers, lakes, and oceans. We've kayaked all around the country, from the east coats to the west. Calculus can be used to calculate the speed of the kayak, the trajectory, the rate of acceleration, and the weight its distribution needed to tip over.

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Boats and boating--Equipment and supplies

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I love to go on hikes/walks with my puppy Banjo! Most of the hikes we go on are very hilly considering we live in the Valley. There is lots of calculus involed in hiking especially up and down hills because the slope you are walking is constantly changing.

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I ended up doing a lot of sailing with my family this summer on our 24 foot yawl. I use calculus to predict the tidal current strength at a given time based on the derivative of the tidal variance.

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I like to walk my dog around Ames Lake everyday as a nice break from quarantine and computer screens. The lake is around 2.2 miles around, and the walk takes around 45 minutes. Calculus can be used to determine our rates, especially because there are a lot of hills so our speed is constantly changing.

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My brother and I hiked Mount Si over the summer. The hike has 3,150 ft in elevation gain and we hiked up in 1.5 hours. With Calculus you could determine rates and where we were on the mountain at a certain time. 

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I am biking everywhere these days.  Other than my family and doing math, it's what makes me most happy! In July we biked around Crater Lake (35 miles and 4000 elevation gain). Pretty sure my Garmin uses some Calculus...