1. Basics

📌 1) Formula

• Speed = Distance / Time
• Distance = Speed × Time
• Time = Distance / Speed

📌 2) Relationships Between Speed, Distance, and Time

• When Speed is constant, Distance and Time are Directly Proportional
  → D = S × T (or) T = D / S
• When Distance is constant, Speed and Time are Inversely Proportional
  → T = D / S (or) S = D / T
• When Time is constant, Distance and Speed are Directly Proportional
  → D = S × T (or) S = D / T

📌 3) Rules for Unit Conversion

• Multiply by 5/18 → km/h → m/s
• Multiply by 18/5 → m/s → km/h