Jahir Ali Khan on Instagram: "This video is a perfect real-world demonstration of Relative Velocity — a key concept in physics that explains how motion is observed differently from different reference frames. When two objects are moving, their velocities change relative to each other depending on the observer: v_{AB} = v_A - v_B This is why: ✅ A plane in the sky may look slow—but it’s actually moving fast relative to the ground ✅ Two moving trains may appear stationary when traveling at the same