AP Physics free response help

  • #1

Homework Statement



Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
http://http://www.collegeboard.com/prod_downloads/ap/students/physics/physics_c_m_frq_02.pdf [Broken]

PLEASE HELP
 
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  • #3
arildno
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1. You must state the problem
Yes, that means posting the problem here. At Pf.

2. You must show your own work.
 
  • #4
http://http://www.collegeboard.com/prod_downloads/ap/students/physics/physics_c_m_frq_02.pdf" [Broken]
 
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  • #8
can you try it and let me know if i should type it
 
  • #9
arildno
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Okay second link works, so what have you done so far? :smile:
 
  • #11
arildno
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Indeed, what have you done so far?
 
  • #13
daniel_i_l
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This isn't a chat room, it takes a few minutes before you get responses.
 
  • #14
on b i am trying to integrate and got x=(8/5)ln{1+5t}
 
  • #15
i really do not think that is correct though
 
  • #16
arildno
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on a)+b), you are correct.
 
  • #17
arildno
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  • #18
is integration the wrong method?
 
  • #19
oh ok thank you, I am having trouble with c and d though
 
  • #20
arildno
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is integration the wrong method?

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

Slow down a bit, will you?
 
  • #21
what is the best method to use
 
  • #22
arildno
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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?
 
  • #23
I'm sorry i think my computer is on delay because the messages dont come up until after i send something else
 
  • #25
arildno
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mass times acceleration?

Agreed!

So, how can you find acceleration? (you already know mass)
 
  • #28
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use
Fnet=ma
 
  • #29
arildno
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dv/dt? could that be used?
Sure!
Isn't that what acceleration is, after all?
 
  • #31
sorry for the random letters your responses dont come up on my comp otherwise
 
  • #32
wait so would dv/dt just be 8/(1+5t)
 
  • #34
arildno
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sorry for the random letters your responses dont come up on my comp otherwise

I understand.

Now, as for d) assuming you manage c), it is perhaps simplest to remember that the impulse over a time interval equals the change in momentum over that interval.
 

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