If a body travels 30m in an interval of 2s, it signifies a fundamental concept in physics: speed. This simple statement opens the door to understanding motion, velocity, and the relationships between distance and time. Let’s delve deeper into what this means and explore its implications.
Calculating Speed from “If a body travels 30m in an interval of 2s”
How do we determine the speed if a body travels 30m in an interval of 2s? The answer lies in a straightforward formula: speed equals distance divided by time. In this case, the distance is 30 meters and the time is 2 seconds.
Speed = Distance / Time
Speed = 30m / 2s
Speed = 15m/s
Therefore, the body’s speed is 15 meters per second. This means that for every second that passes, the body covers a distance of 15 meters.
What Does 15m/s Mean in Real-World Terms?
Visualizing 15 meters per second can be challenging. Let’s compare it to something more relatable. 15m/s is approximately equivalent to 33.5 miles per hour or 54 kilometers per hour. Imagine a car traveling at a moderate speed on a city road – that’s roughly 15m/s.
How is Velocity Different from Speed?
While often used interchangeably, speed and velocity are distinct concepts. Speed is a scalar quantity, meaning it only has magnitude. Velocity, on the other hand, is a vector quantity, possessing both magnitude and direction. If a body travels 30m in an interval of 2s northwards, its velocity is 15m/s north.
Applying the Concept in Different Scenarios
Understanding this fundamental relationship between distance, time, and speed allows us to analyze various situations. For instance, if we know the speed and time, we can calculate the distance traveled. Conversely, if we know the distance and speed, we can determine the time taken.
- Scenario 1: A train travels at 20m/s for 10 seconds. How far does it travel? (Distance = Speed x Time = 20m/s x 10s = 200m)
- Scenario 2: A cyclist needs to cover 500 meters at a speed of 5m/s. How long will it take? (Time = Distance / Speed = 500m / 5m/s = 100s)
Conclusion
The statement “if a body travels 30m in an interval of 2s” provides a foundational understanding of speed, a crucial concept in physics. By applying the formula speed = distance / time, we can calculate the speed as 15m/s. Understanding this principle allows us to analyze various motion-related scenarios and appreciate the difference between speed and velocity.
FAQ
- What is the formula for speed? Speed = Distance / Time.
- What is the difference between speed and velocity? Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).
- How do you convert m/s to km/h? Multiply the speed in m/s by 3.6 to get the equivalent speed in km/h.
- What is the unit of speed? The SI unit of speed is meters per second (m/s).
- Can speed be negative? No, speed is a scalar quantity and therefore cannot be negative. Velocity, however, can be negative to indicate direction.
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