Mathematics

Relative Speed Opposite Direction

Find relative speed when two objects move towards each other.

Relative Speed = u + v

Formula Explanation

Speeds add up when objects move in opposite directions.

Variables Explained

u, v = individual speeds.

Solved Example

Two trains approach each other at 50 km/h and 70 km/h. Relative speed?
Relative speed = 50 + 70 = 120 km/h.

Exam Tip

This is used for meeting time problems.