ap physics b thread!

[jason88]

We have 3 days till the exam. How do you guys feel about the test right now? What are you guys doing to prep?

For me I'm trying to just study study study whatever free response/ mc i can get. I heard the curve isnt as generous as physics c or calc bc.

[Peytoncline]

Well, I feel alright.. i've taken two practice tests so far.. on the first one i missed 27 MC (out of 70) and did pretty well on FR, and i managed to get (barely) a 5 (based on that test).

I took another test the other day and bombed the MC... i missed 36 MC (out of 70)... ouch... pretty bad.. and i did pretty well on FR, and i managed to get a 4 on that test.

so, i need to work on my MC.. if i can get my missed MC under -25 (if i get at least 45 right), then i should be set for a 5

you have any advice on how I should approach MC questions?

[jasonlee576]

i feel like crap.

[Sam I Am]

Ditto jasonlee576. In my practice tests I do pretty well on the FR section, but not so well on the MCQs. The first test I took I had trouble with the actual problems; on the second test I got the problems but ran out of time. Based on what the book said I managed to just get a 4.

Like Peytoncline said, any advice on how to approach the MCQs would be very helpful.

[mrclassicfreak]

I second jasonlee576.

[Sazari]

I third jasonlee576.

[mrclassicfreak]

MCQs are just plain hard. urg, I still didn't get through all the materials.

[concretejungle]

I fourth jasonlee576.

[13579]

all year we used a formula sheet on our MC tests... yea not cool

[lolcats4]

haha such optimism for physics ;P

[fignewton]

Here's a practice problem for you guys:

You lower a 2 kg stone block to the ground from a ledge 1 m high. You are tired and let the block fall at an acceleration of 5 m/s^2. How much work did you do?

a) 0 J
b) 5 J
c) -5 J
d) -10 J
e) -20 J

[13579]

0 work. because i cant do the problem

[lolcats4]

Accelleration due to gravity = 10 m/s^2
if rock falls at 5 m/s^2, then you were providing an acceleration of -5 m/s^2

F = ma = -10 N. For a distance of one meter, this equals -10 J of work.

Do I get a cookie?

[mrclassicfreak]

No.
10chars

[mrclassicfreak]

Ignore me, I'm just bitter today cuz I've been getting the most basic questions wrong.