I used to love, Love, LOVE the Friday 5s. Then the site shut down. I since found another one at Friday5.org
Here are the questions from Friday, and I’m going to try to stick with this again. If anything, it’s a great writing exercise.
1. What piece of information do you keep forgetting?
Telephone numbers that are already saved in my cell phone. If I forget my phone at home (often) or it dies (often, for I’m bad at charging it, another thing I forget) I’m screwed.
2. What regular event in your life do you keep forgetting?
Paying the rent. It’s due on the fifth day of the month. At 11:00pm on the fifth day of the month, one of us is usually dashing across the courtyard to the drop box.
3. How are you with remembering the names of people you meet?
Worse as I get older.
4. What kinds of tricks to you have for remembering to do stuff that falls outside your regular routine?
Notes. Copious notes everywhere
5. If you keep a daily planner, what is it like? If you don’t, why not?
I used to have a palm pilot, but now I use Outlook at work for work-related things (Calendar, Tasklist and Contacts. Used to use Journal, but I can look at my completed tasks and see what I did) and my iPhone calendar and notes for regular things. I want to use RememberTheMilk, but I don’t remember to go to the site on a regular basis.
Posted at: 9:28 am in General, Play
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June 1st, 2008 at 8:16 pm
What are you trying to do? Test me, asking me physics questions that I only have 120 characters to answer???
In order to understand the difference, you need to understand the law of inertia - object at rest remains at rest, object moving in a straight line will continue to move in a straight line unless some force acts on it.
So, when you are moving in a circle, there must be a force acting on you, continuously drawing you AWAY from the straight line path that your inertia would like you to continue following. Newton figured out that the direction of this force must be towards the center of the circle - hence “centri-petal”. Example… you have a rock tied to a string and twirl it in a circle… the force causing the rock to move in a circle is the tension in the string, and the direction of that force is always towards your hand in the center.
So-called “centrifugal” force is the APPARENT force that an observer moving in a circle seems to feel due to the fact that he or she would like to be moving in a straight line, but is not being allowed to. Example: you are in a car going around a turn. The friction between the road and the wheels exerts a (centripetal) force on the car, causing it to turn, let’s say left. But your body, inside the car, is not directly attached to the road, so it tries to continue moving in a straight line! Since the car is moving left, and you are trying to go straight, it feels to you as if you are being “pushed” to the right. BUT THERE IS NOT A “FORCE” PUSHING YOU TO THE RIGHT. There is only your own inertia carrying you in a straight line. Thus centrifugal force is sometimes called a “fictional force” or an “inertial force”. It is not a force at all, merely the subjective sensation of a force caused by the fact that you are following the law of inertia while your surroundings are NOT.