💧 Rain drops
🚶 Person (animated)
📐 Relative velocity vector
☔ Umbrella direction
Umbrella Angle (θ)
0.0
degrees from vertical
Relative Speed
0.00
m/s
v_rp (x-component)
0.00
m/s
v_rp (y-component)
0.00
m/s
v_r = 8.0 m/s ↓
v_p = 4.0 m/s →
v_rp = v_r - v_p = ( -4.0 , 8.0 ) m/s
☔ Umbrella should point
Forward & Vertical
Towards the relative velocity
🔍 What to Observe
- Rain appears to come from an angle when you move
- Umbrella angle θ = tan⁻¹(v_p / v_r)
- Faster you walk → larger umbrella angle
- If v_p = 0, umbrella points straight up (θ = 0°)
- Direction changes when you turn around