Ooviya's Physics Homework Blog: Four Forces

Physics homework for 11/6/14:

Thursday, November 6, 2014

"Four Forces" Blog Post

Describe each of the four types of forces that we did in class in your own words. For each one, give the description and an example of it in your life

Challenge for Ooviya: Write your blog post in a few sentences, dammit!

Four Forces and Examples of the Forces

Today in Ms.Reid's class we learned about the four types of forces; tension, applied force, gravity, and normal force. In my own words, I will describe these forces and then go into what we did today after.

In my own words, gravity, the force we all especially know of, is a non-contact force (a force that does not need to be in direct contact with a body) that pulls objects towards an object with a greater mass than the objects being pulled in. It is a force that attracts bodies to each other and a force that attracts bodies toward any other body having mass, and on Earth gravity attracts bodies towards the center of the Earth and keeps us grounded (it also causes objects to fall when dropped).

Now, I might not describe the other forces as well since I am not too acquainted to them, but doing my best in describing applied force, I believe applied force is a contact force (a force that needs to be in direct contact with a body) that is acted upon/caused by an object by a person or another thing like a person pushing a door open.

Next, normal force is a contact force that is the "equal but opposite force" from one of Newton's laws I believe and it is usually pushing up. It is also perpendicular to the surface an object is resting/moving/etc. on and it counters an opposite force which allows an object to stay still.

Finally, tension force is another contact force that pulls and is probably transmitted through a rope or cord of some sort.

Here are examples of each of the four forces in my own life! :

--Tension force (FT): Whenever my mouse that is connected to my computer's USB driver falls off of my bed it does not touch the ground because it is still attached to my computer's USB drive and because of tension force; there's a pulling force that keeps it from falling and gravity actually makes my mouse fall off of my bed whenever it gets pushed off and gravity would make it fall straight to the ground if it were not for tension force. The cord probably does most of the work, the tension must be in the cord and the force must be sent throughout it which in turn keeps the mouse from dropping to the floor.

Or think about pulleys, swings, ladders, masts, tug-of-war, etc. Maybe not all of them have tension force, but think of strings and ropes when you hear "tension force."

--Gravity (Fg): I rolled off of my bed once oh so elegantly like a beautiful, graceful flamingo without realizing I was super close to the edge and--BAM--HEAD PAIN :-(((. Thanks, Obama--I mean gravity. Yeah, gravity is the reason why my head hit the ground and why my body fell to the ground and did not majestically float as I had hoped it would. Earth's gravity attracts me to the ground because of my tact (just kidding, my tact is non-existent, I'm an awkward penguin for Christ's sake!)

--Normal force (FN): So when I am on the scale checking my weight normal force is being applied on me because if it weren't I would be falling through the ground to the center of the Earth. While gravity is pulling me down (:-((( like it always does, ugh, always putting people down), normal force is pulling me up and it usually always pulls up to offset an opposing force which in turn keeps an object at rest or at least not careening through the ground. The force is perpendicular to the scale and if I weight 110 lbs, gravity would apply 110 N down I believe and normal force would apply 110 N up to make sure I remain still.

Or picture items on a table, especially things that you stand up and try to keep still.

--Applied force (Fapp): When I push the exit doors open to enter into a place like a fool--bad ass I am applying applied force (OOOH, I GET IT NOW *REALIZATION*--don't worry I don't use the exit doors). The reason why is because applied force is a push or pull caused by a person or thing and in this scenario I am pushing or pulling an exit door/enter door open to get in or out.

Or imagine pushing your iPhone off of a table :-))) the beauty is unbearable (just kidding, sorry if someone had a heart attack reading that). xD Oh boy.

Extra section!:

I don't know too much about the forces in general, but I'd love to gather more information about them and learn about them :D.

(Fun fact: Newton actually did not get hit in the head with an apple, he observed an apple falling and knew of and about the concept of gravity beforehand!)

Also, the four forces are either weak or strong or something else (electromagnetic and gravitational I believe) and gravity is a weak force from what I have heard.

I could try and go into a lot about the forces, but for now I will mention what we did in class today. Today we took notes and did four stations to get an idea of the forces. A force in general is an interaction between objects that causes an acceleration. Each force has its own abbreviation with a capital "F" and a subscript. Some forces are contact forces, some are not. But today we were solely introduced to it all.

:333 Arrivederci a domani~.