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Physics

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A model airplane of mass 0.9 kg is attached
to a horizontal string and flies in a horizontal circle of radius 5.2 m, making 1.2 revolutions
every 8 s. (The weight of the plane is balanced
by the upward “lift” force of the air on the
wings of the plane.)
The accelaration due to the gravity is 9.81
m/s2.
Find the speed of the plane

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