A speed boat sounds its horn while moving towards the shore at 44.0 m/s . If people on the shore think the horn frequency is 84.0 Hz , what frequency did the speed boat pilot hear?
73.2 Hz |
94.8 Hz |
74.4 Hz |
96.4 Hz |
This is a problem involving Doppler effect,
Observed Frequency, For a stationary observer ( people at the shore )
where,
Observed Frequency,
Velocity of sound, It is a constant
velocity of boat,
Rearranging for Actual Frequency,
Substituting, Option A
Get Answers For Free
Most questions answered within 1 hours.