# Problem 2-98 - Linear Kinematics - (a)

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.