Physics Uncovered on Instagram: "When someone throws a rock out of a plane, its motion is a mix of gravity, air resistance, and the forward speed of the plane. At the moment it leaves the person’s hand, the rock already has the same horizontal speed as the plane because it was moving with it. So instead of falling straight down, it follows a curved path forward and downward, kind of like a fast forward-moving drop. Gravity immediately begins pulling the rock downward at about 9.8 m/s², so its ve