Wavelength and Speed

Question

1. You observe a transverse wave traveling on a slinky. You notice that 7 waves pass by in 4.0 seconds.You measure the distance to be 0.75m from crest to crest. How fast is the wave travelling? 

Answer 1

1. You observe a transverse wave traveling on a slinky. You notice that 7 waves pass by in 4.0 seconds. You measure the distance to be 0.75m from crest to crest. How fast is the wave travelling? 

v = ? m/s

λ = 0.75m

f = # of waves in 1 second = 7/4Hz

v = f•λ

= (7/4)•0.75

v = 1.3 m/s

Mr. A