2nd Scholarship question.

Time for the 2nd scholarship question that Mr. Thompson wants us to answer.

See if you can help me out.

There is a bird in a cage. (The cage is like a normal bird cage, ie. barred) 

It is standing in the cage.

The cage is placed on a set of scales.

The weight is registered by the scales and it has stabilised by now.

The bird now starts flying inside the cage.

What happens and why? (I'm guessing he was referring to the weight)

I have a couple of theories but I don't want to influence your thoughts.

Physics question.

As mentioned in my previous post, I had to miss out on my scholarship class.
Anyway I caught up with one of my friends in the class and he told me that we got a question to work on during the week.

I found this quite hard and I hoped one of you might be able to help.

To understand the question you need to look at a diagram:
http://i26.tinypic.com/11j6hx4.jpg

The diagram shows a mass hanging off a thin string (String A). A thicker string is attached to the bottom of the mass (String B).

The question is:
If String B is pulled very gently, String A breaks/rips and
if String B is pulled very quickly, String B breaks/rips.
Why?

I am thinking this might have to do with elasticity constants and impulse but please answer with some reasonable detail. Thanks.

P.E. teachers.

P.E.
Physical Education.
Some readers might know it as gym class.

So the new school term started. Hurrah for Term 3.
Now exams get closer and therefore scholarship classes have to get started and they started today.
I was looking forward to it as I got to miss running cross country practice for PE.

So I walked into the physics scholarship class and got a warm welcome from the teacher and he wanted me to just check with my PE teacher if it was all right.

So I jog down to where my teacher is outside the Gym and I ask him.
"Sir, is it okay if I do my scholarship classes for Physics?"
and he replies, "No, I want you to take PE until cross country is over" (Cross country is about 4 weeks from now)

He sounded quite offended when he said it as well which ticked ME off.

Now my problem with this is, I do not think, that PE is anywhere as important as scholarship classes. Every class has a ton of things that I can learn from it and considering the fact that only around 3.5% of students get a scholarship, every week is important.

So why does my teacher think that cross country PRACTICE is necessary/more important than my physics scholarship class?

Yes it's nerdy but justified.

Well as a result of his answer, I had to jog back to my class, get my stuff and run back and then run around a kilometre which caused some knee injury.

Damn PE.