A sounding body emitting a frequency of is dropped from a height
PHYSICS · Single correct · A Level · Physics · Waves · Waves
Problem
A sounding body emitting a frequency of 150 Hz is dropped from a height. During its fall under gravity it crosses a balloon moving upwards with a constant velocity of 2 m/s one second after it started to fall. The difference in the frequency observed by the man in balloon just before and just after crossing the body will be (velocity of sound = 300 m/s , g=10 m/s2 )
(1) 12
(2) 6
(3) 8
(4) 4