As of recently my physics class and I have been exploring the world of free fall and how physics has anything to do with it. This video discusses free falling objects and how this is physics. It explores how to answer the questions as well as how to perform the equations which we discussed in class. It informs the viewer that free fall is one dimensional
motion. This video has helped me and should help others piece together the real world and physics.
Wednesday, October 23, 2013
Sunday, October 13, 2013
Tuesday, October 1, 2013
Unit Blog Reflection
Paul G. Hewitt the creator/ editor/ author of my textbook said "the main reason to study physics is to enhance the way you see the physical world." When I first read this quote I was unsure what he actually meant and it is still not completely instilled in my brain. Everything I have learned so far has aided in the quote being plastered in my mind, because already things that I see on a regular basis have changed. Hewitt goes on to say to us as students that we " will see the equations as guides to thinking." I agree with this quote because at first I didn't understand the equations but as soon as real life examples were used I understood them. Already things that I have seen before I connect with what I am learning so I can better understand it. I am pumped to learn learn more physics (maybe I spoke to soon), but in order for myself and you as a reader to understand
In this unit I learned many things , which I've realized most I already Kind of knew.
This unit began with inertia and Newton's first law. What many people don't know is that inertia and Newton First Law is all around us and are probably apart of something we couldn't fathom before like when dishes are on the table and the tablecloth is pulled from underneath it. Inertia is the resistance of any physical object to any change in its motion (including a change in direction). In other words, it is the tendency of objects to keep moving in a straight line at constant linear velocity, or to keep still.The big problem/ re-occuring problem for this section was why does an object stay still or kept moving.
ex. The dishes are at rest on the table. When the tablecloth is quickly removed it does not exert any force on the dishes and so the dishes remain at rest. We know this because of Newton's First law which says that an object at rest stays at rest unless acted on by an outside force. No force on the dishes results in the dishes staying at rest.
Another example of inertia is hovercraft riding. In an earlier post I explained my experience and what I learned through the experience. In this lab I learned and experienced the other part of Newton's first law which says an object in motion stays in motion unless acted on by an outside force.
In this unit I also learned I also learned about equilibrium and net force. I was able to experience these first hand while also completing the hovercraft lab. Net force is the force on an object was shown and experienced in this lab by the starting point which by one pushing the hovercraft forward exerted force and when it got to the other end someone pushing it in the opposite direction first slowed it down its momentum then propelled it back towards the starter. Equilibrium was exemplified in the lab through resting place and where there were no forces acting on it and in phase 2 which was when it was gliding.
Speed, velocity, and acceleration were also huge parts of this unit. Speed is the magnitude of velocity. Velocity is the rate of change of the position of an object. Many including myself confuse speed and velocity for each other but they are different. Velocity requires a specific direction while speed does not. So IF SOMETHING IS CHANGING DIRECTION IT IS ALSO CHANGING VELOCITY. When velocity changes that is known as acceleration or deceleration. This means that acceleration is the change in speed, direction, or both of an object. We also learned the equations which go along with this unit which are:
constant velocity = distance/time
constant acceleration
how far: d= 1/2 at^2
how fast: v=at
for finding the change in velocity one uses the equation a= change in v/ time
The big question posed in this section was what is the difference between constant velocity and constant acceleration. Constant velocity I now know is something that doesn't change in speed or direction, and constant acceleration is the change is of velocity. Acceleration is gaining speed while velocity keeps a constant speed unless a change in direction occurs.
There were many things that were difficult for me to understand at first. They included constant velocity and how it affected acceleration, which I have already explained. I also didn't quite understand how velocity could go forward and acceleration go backwards.
My problem- solving skills are fairly the same because I've always been taught to think and express things for myself. Now I just need to apply myself more so I could understand better.
My goals for the next unit are to push myself, ask more questions, and to take more opportunities.
.
In this unit I learned many things , which I've realized most I already Kind of knew.
This unit began with inertia and Newton's first law. What many people don't know is that inertia and Newton First Law is all around us and are probably apart of something we couldn't fathom before like when dishes are on the table and the tablecloth is pulled from underneath it. Inertia is the resistance of any physical object to any change in its motion (including a change in direction). In other words, it is the tendency of objects to keep moving in a straight line at constant linear velocity, or to keep still.The big problem/ re-occuring problem for this section was why does an object stay still or kept moving.
ex. The dishes are at rest on the table. When the tablecloth is quickly removed it does not exert any force on the dishes and so the dishes remain at rest. We know this because of Newton's First law which says that an object at rest stays at rest unless acted on by an outside force. No force on the dishes results in the dishes staying at rest.
Another example of inertia is hovercraft riding. In an earlier post I explained my experience and what I learned through the experience. In this lab I learned and experienced the other part of Newton's first law which says an object in motion stays in motion unless acted on by an outside force.
In this unit I also learned I also learned about equilibrium and net force. I was able to experience these first hand while also completing the hovercraft lab. Net force is the force on an object was shown and experienced in this lab by the starting point which by one pushing the hovercraft forward exerted force and when it got to the other end someone pushing it in the opposite direction first slowed it down its momentum then propelled it back towards the starter. Equilibrium was exemplified in the lab through resting place and where there were no forces acting on it and in phase 2 which was when it was gliding.
Speed, velocity, and acceleration were also huge parts of this unit. Speed is the magnitude of velocity. Velocity is the rate of change of the position of an object. Many including myself confuse speed and velocity for each other but they are different. Velocity requires a specific direction while speed does not. So IF SOMETHING IS CHANGING DIRECTION IT IS ALSO CHANGING VELOCITY. When velocity changes that is known as acceleration or deceleration. This means that acceleration is the change in speed, direction, or both of an object. We also learned the equations which go along with this unit which are:
constant velocity = distance/time
constant acceleration
how far: d= 1/2 at^2
how fast: v=at
for finding the change in velocity one uses the equation a= change in v/ time
The big question posed in this section was what is the difference between constant velocity and constant acceleration. Constant velocity I now know is something that doesn't change in speed or direction, and constant acceleration is the change is of velocity. Acceleration is gaining speed while velocity keeps a constant speed unless a change in direction occurs.
There were many things that were difficult for me to understand at first. They included constant velocity and how it affected acceleration, which I have already explained. I also didn't quite understand how velocity could go forward and acceleration go backwards.
My problem- solving skills are fairly the same because I've always been taught to think and express things for myself. Now I just need to apply myself more so I could understand better.
My goals for the next unit are to push myself, ask more questions, and to take more opportunities.
.
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