Problem 2-98 - Linear Kinematics - Part 6 - (b)
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.
Accumulated Solution
\(d = vt \\ d = (350\; m/s)(3.4\; s) = 1190\; m \\ \text{The helicopter encounters the echo} \; 1190 - 700 = 490\; m\; \text{ from the cliff.}\)
\(\text{The helicopter has traveled} \; 700 - 490 = 210\;m\; \text{in} \; 3.4\; s. \)
No. You have used the wrong distance.