At an auto race, a member of the pit crew stands beside the track. a car approaches him at 100 m/s and emits a sound at frequency 1100hz. the air is still and the speed of sound is 340mls. what frequency will the pit crew member hear? a.1560hz b.1420hz c.1640hz d.850hz

As per the formula of Doppler's effect we know that

now we know that

v = 340 m/s

now we will have

so the frequency heard by the crew will be approx 1560 Hz

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

the answer is 100. i just did this lesson and got a 100% on it. : )

-fishtank