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Spring Scale Help

  • Thread starter fender5791
  • Start date
  • #1
If you stand on a bathroom scale, the spring inside the scale compresses 0.50 mm, and it tells you your weight is 740 N. Now if you jump on the scale from a height of 1.2 m, what does the scale read at its peak?


I'm guessing you use 1/2kx^2 but otherwise, I'm not sure.
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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Welcome to PF!

Hi fender5791! Welcome to PF! :smile:

(try using the X2 tag just above the Reply box :wink:)
If you stand on a bathroom scale, the spring inside the scale compresses 0.50 mm, and it tells you your weight is 740 N.
ok, so what is the value of k? :smile:

(and yes, you can use 1/2 kx2 later)
 
  • #3
So would k be (740N)/(.0005m) = 1.48x10^6 N/m?
 
  • #4
tiny-tim
Science Advisor
Homework Helper
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Yup! :biggrin:

Now use KE + PE = constant.​
 
  • #5
Got it, thanks.
 

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