A care package is dropped from an airplane flying at 1000 m above sea level with a velocity of 200 m/s to an island. If it takes
1 answer:
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Answer:
a)
b)
Explanation:
Given:
Frequency of the whistle, f = 564 Hz
Radius of the circle, r = 71.2 cm = 0.712 m
Angular speed, ω = 17.1 rad/s
speed of source, = rω = 0.712 × 17.1 = 12.1752 m/s
speed of sound, v = 343 m/s
Now, applying the Doppler's effect formula, we have
where,
= relative speed of the detector with respect to medium = 0
a) for lowest frequency, we have the formula as:
on substituting the values, we get
or
b) for maximum frequency, we have the formula as:
on substituting the values, we get
or