1. Jul 30, 2008

HELP_786

how would i go about finding k with given values for mass and time?

i have seen these equations over and over...but i feel like im missing something very important that i need..please help me

T=2π√(m/k))

F=-kx

2. Jul 30, 2008

rock.freak667

$$T= 2 \pi \sqrt{\frac{m}{k}}$$

$$\Rightarrow T^2=\frac{4 \pi^2 m}{k}$$

Can you rearrange for k now?

Last edited: Jul 30, 2008
3. Jul 30, 2008

HELP_786

o im sorry i meant how would I go about finding T(period) with given values for time and mass...............i forgot to proof read

those are the formulas i keep seeing everywhere

for example if i had .10kg and 8.86 seconds for the time to find the period would i do this:

T2=(4π2m)/((4π2m)/(8.86))

and then at the end take the square root

???

4. Jul 30, 2008

rock.freak667

How exactly was the time measured?

5. Jul 30, 2008

HELP_786

in seconds

8.86 seconds would be the average time for 10 vibrations in a simple harmonic motion

6. Jul 30, 2008

rock.freak667

Period(T) is the time taken for one oscillation/vibration.

10 oscillations/vibrations take 8.86 seconds. How much time would 1 oscillation take?

7. Jul 30, 2008

HELP_786

OH!!! so just divide 8.86s by 10 rite??

8. Jul 30, 2008

rock.freak667

That should yield the time period, yes.

9. Jul 30, 2008

HELP_786

i dont believe i didnt realize that! thanku so much! ....im thinking too much lol

10. Jul 30, 2008

rock.freak667

You just need to think about what it is you want to find.

11. Jul 30, 2008

HELP_786

thanx again! =D