The ideal spring and simple harmonic motion

  • #1

Homework Statement



A person who weighs 665 N steps onto a spring scale in the bathroom, and the spring compresses by 0.67 cm.
(a) What is the spring constant?
(b) What is the weight of another person who compresses the spring by 0.37 cm?


Homework Equations



f=-Kx

frequency=(1/2pi)(k/m)^.5
frequency=1/T
where T=period

The Attempt at a Solution


f=kx
665N=K(.67cm)
K=992.53
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
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31

The Attempt at a Solution


f=kx
665N=K(.67cm)
K=992.53 N/cm

Write in your units.

So you basically want to to find F, for a given x and you know k. Just re-use the formula again.
 
  • #3
thanks, i did that but the answer for that part is still wrong and i cant figure out why
 
  • #4
rock.freak667
Homework Helper
6,230
31
thanks, i did that but the answer for that part is still wrong and i cant figure out why
What is the given answer?
 
  • #5
there is none. its an online homework so they dont give answers untill after its due
 
  • #6
LowlyPion
Homework Helper
3,090
4
there is none. its an online homework so they dont give answers untill after its due
Likely they want the answer in N/m, not N/cm
 

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