Physics · Kinematics Crossing a River — Relative Velocity Aim upstream or straight across and watch the current sweep the boat.
Physics · Kinematics Relative Velocity — The River Crossing (Explainer) A guided, step-by-step walkthrough of the river-crossing vectors.
Physics · Kinematics Bouncing Ball on an Incline A ball dropped onto a slope bounces in ever-shifting parabolic hops.
Physics · Kinematics Projectile Motion Playground Fire a projectile and trace its parabola with range, height and flight time.