Homework Help: AP Physics free response help

harmonicmotion · Apr 7, 2007

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

harmonicmotion · Apr 7, 2007

http://http://www.collegeboard.com/prod_downloads/ap/students/physics/physics_c_m_frq_02.pdf [Broken]

PLEASE HELP

arildno · Apr 7, 2007

1. You must state the problem
Yes, that means posting the problem here. At Pf.

2. You must show your own work.

harmonicmotion · Apr 7, 2007

http://http://www.collegeboard.com/prod_downloads/ap/students/physics/physics_c_m_frq_02.pdf" [Broken]

harmonicmotion · Apr 7, 2007

http://www.collegeboard.com/prod_downloads/ap/students/physics/physics_c_m_frq_02.pdf

harmonicmotion · Apr 7, 2007

its the first question

harmonicmotion · Apr 7, 2007

the second link works i think

harmonicmotion · Apr 7, 2007

can you try it and let me know if i should type it

arildno · Apr 7, 2007

Okay second link works, so what have you done so far?

harmonicmotion · Apr 7, 2007

are you still there

arildno · Apr 7, 2007

Indeed, what have you done so far?

harmonicmotion · Apr 7, 2007

i did a) and got 500 kg

daniel_i_l · Apr 7, 2007

This isn't a chat room, it takes a few minutes before you get responses.

harmonicmotion · Apr 7, 2007

on b i am trying to integrate and got x=(8/5)ln{1+5t}

harmonicmotion · Apr 7, 2007

i really do not think that is correct though

arildno · Apr 7, 2007

on a)+b), you are correct.

arildno · Apr 7, 2007

harmonicmotion said: ↑

i really do not think that is correct though

But it is.

harmonicmotion · Apr 7, 2007

is integration the wrong method?

harmonicmotion · Apr 7, 2007

oh ok thank you, I am having trouble with c and d though

arildno · Apr 7, 2007

harmonicmotion said: ↑

is integration the wrong method?

Eeh, do you even take time to read the replies you get??

Slow down a bit, will you?

harmonicmotion · Apr 7, 2007

what is the best method to use

arildno · Apr 7, 2007

harmonicmotion said: ↑

oh ok thank you, I am having trouble with c and d though

Ok, now, is there some other quantity you can calculate by means of which you can calculate the force acting upon the object?

harmonicmotion · Apr 7, 2007

I'm sorry i think my computer is on delay because the messages dont come up until after i send something else

harmonicmotion · Apr 7, 2007

mass times acceleration?

arildno · Apr 7, 2007

harmonicmotion said: ↑

mass times acceleration?

Agreed!

So, how can you find acceleration? (you already know mass)