Here's the question you clicked on:
MarcLeclair
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 :/
(b) In this case the force is equal to F=-kx, |F|=kx. If k =const. the maximum force is when x is maximum.
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)
yes. that is right. please can you tell me about the letter a .
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)
that is fmax=20.56*15.5. what is the question in letter a?
oh my bad Its this : The angular frequency.
find the angular frequence* which i found with the t=1/f
In a i have to find the angular frequency, the w of the following equation x=Asin(wt+ alpha) alpha being the phase constant.
I found my W using the fact that frequency is T ( period) = 1/f and therefore T=2pi/w
it is OK. Now I urderstood. k=w^2*m
in letter b you got the correct answer
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?
so f=kx therefore my amplitude is 31/2 so f = 20.56 *.240 no?
yeah sorry and it g ives 319 but it says its wrong, I don't know what to do to change it