Question

A wave moves on a slinky with a frequency of 2hz and wavelength of 10cm how long will it take to reach at the end of slinky of length 2 meter

Answer 1

Given that,

Frequency = 2 Hz

Wavelength = 10 cm

Distance = 2 m

We need to calculate the velocity

Using formula of velocity

$v =f\times \lambda$

Where, f = frequency

λ = wavelength

Put the value into the formula

$v=2\times10\times10^{-2}$

$v = 0.2\ m/s$

We need to calculate the time

Using formula of time

$t = \dfrac{D}{v}$

Where, D = distance

v = velocity

Put the value into the formula

$t=\dfrac{2}{0.2}$

$t=10\ sec$

Hence, It will reach at the end of slinky in 10 sec.