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.

diagram of 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.