1. Let's start by stating the problem: We want to understand the concept of relative speed and how to use it. 2. Relative speed is the speed of one object as observed from another moving object. It helps us find how fast two objects are moving towards or away from each other. 3. The formula depends on the direction of motion: - If two objects move in the same direction, relative speed = $|v_1 - v_2|$ - If two objects move in opposite directions, relative speed = $v_1 + v_2$ 4. Here, $v_1$ and $v_2$ are the speeds of the two objects. 5. Important rule: When objects move towards each other, add their speeds to get relative speed. 6. When objects move in the same direction, subtract the smaller speed from the larger speed to get relative speed. 7. Example: If a car moves at 60 and a bike at 40 in the same direction, relative speed = $60 - 40 = 20$. 8. If they move towards each other, relative speed = $60 + 40 = 100$. 9. This helps us calculate time or distance when two objects are moving relative to each other. 10. In summary, relative speed simplifies problems involving two moving objects by focusing on their speed difference or sum depending on direction.