In an experiment on waves along a stretched string

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

In an experiment on waves along a stretched string,

15

crests pass a fixed point in

3.0\,\text{s}

. The distance between the first and the seventh crest (counted along the string) is

84\,\text{cm}

. Calculate the speed of the wave. (a)

1.4\,\text{m}\,\text{s}^{-1}

(b)

0.70\,\text{m}\,\text{s}^{-1}

(c)

4.2\,\text{m}\,\text{s}^{-1}

(d)

0.60\,\text{m}\,\text{s}^{-1}