Problem 2-98 - Linear Kinematics - (b)

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


No. If the helicopter travels faster than the signal it will hit the cliff before the signal can reflect off it.

 

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