2-98
A helicopter is traveling horizontally, straight toward a cliff. When
700 m from the cliff, it sends a sonar signal and 3.4 s later receives
the reflected signal. Assuming the signal travels at 350 m/s, determine
the speed of the helicopter.
Correct.
The time of flight of the signal is:
(A) 3.4 s
(B) 3.4 s + the time during which
the helicopter moves.
(C) 3.4 s - the time during which
the helicopter moves.