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February 26, 2015

February 26, 2015

Posted by **sand** on Tuesday, December 27, 2011 at 6:03am.

What is the force constant of the spring?

What is the mass of the unknown weight?

If the weight is pushed down 10cm and released, how fast is it moving at its maximum speed?

- physics -
**drwls**, Tuesday, December 27, 2011 at 7:26amUse this statement to determine k:

<<When a 1 kg mass is added, the large weight sank down an additional 3 mm. >>

k = m*g/X

= (1 kg)*(9.8 m/s^2))/0.003 m

m is the added mass and X is the resulting extra deflection

Use that k value and this formula to obtain M:

w = 2*pi*f = sqrt(k/M)= 2*pi*(0.2 s^-1)

Note that 12 cycles per minute was converted to frequency in Hz.

w is the angular frequency

Use this formula to determine max speed, Vmax:

Vmax = w*(amplitude)

- physics -
**sand**, Tuesday, December 27, 2011 at 7:48amThanks for your time

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