[SOLVED] What is the mass of the fish? You can ignore the mass of the spring.?

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The formula for the oscillation of a mass on a spring is T=2π√(m/k)

The relationship between frequency and period is T=1/f so the period is 1/2.60=0.3846 s.

From the information given, a force of 200N will stretch the spring by 0.125m.

That enables us to find the spring constant since k=F/x

k=200/0.125=1,600 N/m

Rearrange the formula

T=2π√(m/k)

T²=4π²m/k

m=kT²/4π²

m=_____________ kg

i think this the correct answer for What is the mass of the fish? You can ignore the mass of the spring.?

Force constant=200/0.125=1600 N/m

Frequency= f =(1/2pi) sq rt [k/m]

squaring and simplifying,

mass = m = k /(2pi*f)^2

m=1600 /(2pi*2.6)^2=5.9953 kg

the mass of the fish is 5.9953 kg