# npignato

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12

## Community Reputation

10 Good

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• Birthday 03/14/1996

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1. ## Physics of water skiing

Water skiing involves many different components of physics. The fundamentals of it are based mainly on angles and gravity. When you are trying to get up, you have to make sure you keep your ski at a certain angle so that the water pushes down on the ski, creating a downward force that enables you to stand up. Once the force of the water pushing up on the ski is equal to the force of gravity pulling down on the ski, you are able to stay on top of the water. Tension is also involved in water skiing because the rope from the boat to your hand pulls tightly, creating tension. When the tension in the rope is constant, you will be traveling at the same speed as the boat pulling you. However, since the rope from the boat to the water skier keeps you moving in a circular path. Since you are moving in a circular path, there is also centripetal force. When the centripetal force is high, the water skier may be moving faster than the boat itself.
2. ## physics of ripples

have you ever thrown a rock into a pond and wondered why the water moves in that ripple pattern? well i have, so i decided to figure out what makes that happen. i found that when you throw the rock into the still water, it creates a disturbance. this disturbance transfers energy and momentum into the water pushing it and making it ripple; its called a wave. the ripples in the water are a transverse wave. the particles in the water move in a direction perpendicular to the direction the wave is moving. if is a leaf sitting on top of the water and you throw a rock in, when the waves energy reaches the leaf, it will move up and down while the wave is still moving horizontally. it moves like this because it is a transverse wave. so what happens when you throw two rocks into the water simultaneously? when both the rocks create a disturbance in the water, they will both make waves. when the waves collide, they will either create constructive or destructive interference. if a crest meets with a crest and a trough with a trough it will create constructive interference. when a crest meets a trough, it will create destructive interference and cancel out the motion of the waves leaving a still spot.
3. ## Physics of Lacrosse

While i was at lacrosse i was wondering, how do players get the ball to move out of their stick so fast? After practice I decided to look further into my question. By applying different topics that i learned in physics class, i was able to find an answer. there are many factors involved in throwing a lacrosse ball, one of them being momentum. when throwing a lacrosse ball, you pull on the bottom of the stick and push on the top end while stepping at the same time. the momentum from your arms pushing and pulling on the stick causes energy to build up and transfer to the head of the stick. the stepping motion also allows your body to build up momentum which gets the ball moving at a greater velocity. Static and dynamic energy is also a big part of throwing a lacrosse ball. while the ball is just sitting in the stick, it has static energy, however, when you pull your arms, you create dynamic energy. the dynamic energy passes through your body and into the stick. the energy travels through the stick and into the ball causing the ball to release from the stick. the velocity on the ball depends on how much momentum and energy you can get behind the ball. by using your entire body, from legs to arms, you can get more energy and momentum behind the ball creating a greater velocity.
4. ## Physics of softball

good job juliana!
5. ## Diffraction of light in my bedroom

diffraction makes so much sense now!
6. ## Veritcal Height test Deliverable

This experiment had a large margin of error, due to in part from the equipment used and its mechanical limitations. The stop watch used is extremely hard to time with a person jumping, and just as hard to stop when the person lands back down. In order to eliminate much of the error, a more state of the art piece of equipment can be used to record the data. An infrared beam attached to a computer, with the Logger Pro program on, would more easily record the time of a person jumping and falling back down.
7. ## Speeding Lab

Nick Pignato, Caitlin Maggio, Alex Miller, Erica Plukas Ourgroup was presented with a task of determining the average velocity of motorvehicles on Cooper Road. We wereprovided a stop watch and tape measure, in which we utilized to measure out 20meters along the side of the road, and time how long it took for the vehiclesto transport from start to finish. Thepurpose of the task was to figure out if drivers were breaking the speed limitof 35 miles per hour. Weplanned to have two stops along the side of the road, where we timed how longit took for the car to travel between. Asthe car passed by the first person yelled “go” and the timer started the clockuntil the second person yelled “stop”. We recorded the data from 10 cars and then moved to another location andrepeated the process.
8. ## hiii

Hi Juliana, youre in my class and I'm looking forward to getting to know you this year.
9. ## Nick Pignato

My name is Caitlin Maggio, and I am currently a junior taking physics. I enjoy playing soccer and lacrosse, and am very social. When I'm older, I plan to study sports medicine or sports therapy. I chose physics as my science this year because I thought it would help me to understand my future plans and continue to expand my knowledge in the science environment. I'm looking forward to learning new things during this course and hope I enjoy it!
10. ## Jay

good luck in physics.
11. ## starting physics

good luck in physics andrew.
12. ## physics

I am a junior at irondequoit high school. one thing i like to do is play lacrosse. i hope to become a doctor in the future. i signed up to take physics because i thought the class would be interesting and would help me in the future. i thought the class would educate me more in science, which would help me become a doctor.

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