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Obtain the speed of the airplane relative to the air

After flying for 15 min in a wind blowing 42 km/h at an angle of 28° south of east, an airplane pilot is over a town that is 56 km due north of the starting point. What is the speed of the airplane relative to the air?

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## Q : Find the speed at which the penny strikes the ground

A child throws a penny off of the Eiffel tower (h = 324m) with a downward velocity of magnitude v0 = 13 m/s. Find the speed at which the penny strikes the ground, vf (in m/s), using the initial velocity, v0, and the drop distance, h