Time, Speed & Distance: Complete Notes, Formulas, Examples, and Practice Questions
Time, Speed & Distance: Complete Notes, Formulas, Examples, and Practice Questions 1. Core Concepts & Formulas A. Basic Formulas Speed = Distance / Time Measures how fast an object moves 1 2 3 4 5 6 7 . Distance = Speed × Time Time = Distance / Speed Units: Speed: km/hr, m/s 1 km/hr = 5/18 m/s 1 m/s = 18/5 km/hr 2 4 5 6 B. Average Speed If different distances are covered at different speeds: Average Speed = Total Distance Total Time Average Speed = Total Time Total Distance If equal distances at speeds x x and y y : Average Speed = 2 x y x + y Average Speed = x + y 2 x y 2 3 5 6 C. Relative Speed Same Direction: Relative Speed = Difference of speeds = |A - B| Opposite Direction: Relative Speed = Sum of speeds = A + B Application: Used in problems involving two moving objects, like trains, cars, or boats 2 3 5 6 . 2. Trains When two trains of lengths L 1 L 1 and L 2 L 2 move...