A vertical scale on a spring balance reads from 0 to 155 N . The scale has a length of 10.0 cm from the 0 to 155 N reading. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.20 Hz .Ignoring the mass of the spring, what is the mass m of the fish?

mass of the fish is 8.11 kg

Explanation:

As we know that the frequency of oscillation of spring block system is given as

here we know that the reading of scale varies from 0 to 155 N from length varies from x = 0 to x = 10 cm

Now we have

so now we have

so mass of the fish is 8.11 kg

the answer is b ) square root of 5