What is the tension in the cable, ignoring air resistance?
A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 142-kg laser sensor that measures the thickness of the ice. The helicopter and the sensor both move only in the horizontal direction and have a horizontal acceleration of magnitude 3.09 m/s2.
Let:
T be the tension in the cable,
m be the mass of the sensor,
a be its acceleration.
T = ma
= 142 * 3.09
= 439N to 3 sig. fig.
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