Problem 2-98 - Linear Kinematics - (a)

A helicopter is traveling horizontally, straight toward a cliff. When 700m from the cliff, it sends a sonar signal and 3.4s later receives the reflected signal. Assuming the signal travels at 350m/s, determine the speed of the helicopter.

diagram of helicopter


Correct.

 

The time of flight of the signal is:

(A)   3.4s

(B)   3.4s+  the time during which the helicopter moves.

(C)   3.4s the time during which the helicopter moves.