Using the mks units (meters-kilograms-seconds), suppose you have a spring with spring constant 4 n/m. you want to use it to weigh items. assume no friction. you place the mass on the spring and put it in motion. a) you count and find that the frequency is 0.8 hz (cycles per second). what is the mass? b) find a formula for the mass m given the frequency ω in hz

Our values,

We can find the angular velocity,

a) To calculate the mass we know that the formula of

Re-arrange for the mass

b) We can use the latest equation to make a relation between the mass and the frquency,

We have that,

(1)

(2)

Making equal ,

Re-arrange to m,

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

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