Physics

Problem

A supply package is released from a plane flying horizontally at

100\,\text{m/s}

at an altitude of

120\,\text{m}

. After release, the package experiences a constant horizontal deceleration of

0.40\,\text{m/s}^2

(opposite its initial motion) while gravity acts downward at

9.8\,\text{m/s}^2

. Neglect vertical air resistance. Calculate the angle below the horizontal of the package’s velocity vector just before it reaches the ground.