16 At a particular instant

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Kinematics · Kinematics

Problem

16 At a particular instant, a stationary observer on the ground sees a package falling with speed v1 at an angle to the vertical. To a pilot flying horizontally at constant speed relative to the ground, the package appears to be falling vertically with a speed v2 at that instant. What is the speed of the pilot relative to the ground? (A) v1+v2v_{1}+v_{2} (B) v1−v2v_{1}-v_{2} (C) v2−v1v_{2}-v_{1} (D) v12−v22\sqrt{\mathrm{v}_{1}{ }^{2}-\mathrm{v}_{2}{ }^{2}} (E) v12+v22\sqrt{v_{1}{ }^{2}+v_{2}{ }^{2}}

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