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Amount of time for a half period to occur 
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#1
Oct2511, 03:22 PM

P: 53

1. The problem statement, all variables and given/known data
A massspring system has k = 105 N/m and m = 1.75 kg. If it is undergoing simple harmonic motion, how much time does it take the mass to go from x = A to x = 0? 2. Relevant equations T=2pi*sqrt(m/k) 3. The attempt at a solution Tried plugging in the values for the equation I gave to find T, then cutting it in half to find the amount of time the question asked for, but it's not the correct answer. 


#2
Oct2511, 03:25 PM

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What exactly is one cycle? If you understand that, you'll see why your answer is wrong. It may help to look at a diagram that shows one period in your textbook.



#3
Oct2511, 03:25 PM

P: 53

When the mass goes into the spring and back?



#4
Oct2511, 03:26 PM

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Amount of time for a half period to occur
Sketch the x(t) function for a full period and see.
ehild 


#5
Oct2511, 03:32 PM

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#6
Oct2511, 03:33 PM

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Who's A and can you link it to T ? EDIT: So A's the amplitude...



#7
Oct2511, 03:36 PM

P: 53

Uhh x goes to A? Which equation can I use to solve for that? x=Acos(ωt)?
Sorry I'm braindead been studying all morning I just want this homework done. 


#8
Oct2511, 03:54 PM

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ehild 


#9
Oct2511, 10:20 PM

P: 53

So I can plug in x as A so that A cancels out here and then solve for t where T = 1/2?



#10
Oct2611, 02:45 AM

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Would you please show me a cosine function? Please!!!! ehild 


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