Frequency of waves reflected from an approaching truck

[brownniegyal]

A stationary motion detector sends sound waves of frequency 0.0620 MHz toward a truck approaching at a speed of 40.5 m/s. What is the frequency of the waves reflected back to the detector? (Take the speed of sound to be 343 m/s.)

Please provide a solution rather than just an answer :) I really appreciate any help!

 

[Kurdt]

We won't provide you with full solutions on this forum as the student will not learn anything if we do. I suggest you review the following web page and post your attempt at a solution so we may guide you.

http://hyperphysics.phy-astr.gsu.edu/hbase/sound/dopp.html

 

[malawi_glenn]

brownniegyal: Have you read the forums rules?