anonymous
  • anonymous
A 240g particle oscillating in SHM travels 31cm between the two extreme points in its motion with an average speed of 90cm/s. b) The maximum force on the particle. Can't figure that one out :/
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
(b) In this case the force is equal to F=-kx, |F|=kx. If k =const. the maximum force is when x is maximum.
anonymous
  • anonymous
Natan is right k=mg/h and since Fmax = kh = mg/h *h = mg =0.24*Acceleration due gravite (9.8 m/s2 or something like that)
anonymous
  • anonymous
yes. that is right. please can you tell me about the letter a .

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anonymous
  • anonymous
That doesnt work though I tried, in letter A i got the answer right I did t=1/f therefore t=2pi/w which is in turn w=9.26. Knowing the mass is .240 kg you can find out k being 20.56 no? and I get fmax = 15.5cm * 25.56 (15.5cm being the Xm)
anonymous
  • anonymous
that is fmax=20.56*15.5. what is the question in letter a?
anonymous
  • anonymous
oh my bad Its this : The angular frequency.
anonymous
  • anonymous
find the angular frequence* which i found with the t=1/f
anonymous
  • anonymous
Sorry i'm confused now.
anonymous
  • anonymous
In a i have to find the angular frequency, the w of the following equation x=Asin(wt+ alpha) alpha being the phase constant.
anonymous
  • anonymous
I found my W using the fact that frequency is T ( period) = 1/f and therefore T=2pi/w
anonymous
  • anonymous
it is OK. Now I urderstood. k=w^2*m
anonymous
  • anonymous
in letter b you got the correct answer
anonymous
  • anonymous
yeah so k = 9.26^2 * .240g which gives me 20.56 but it always gives it wrong to me :/ could it be the sign?
anonymous
  • anonymous
so f=kx therefore my amplitude is 31/2 so f = 20.56 *.240 no?
anonymous
  • anonymous
no f=15.5*20.56
anonymous
  • anonymous
yeah sorry and it g ives 319 but it says its wrong, I don't know what to do to change it

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