What is m/s (Metres Per Second)?

S1-SA4-0931

Grade Level:

Class 5

Physics, Computing, AI, Transport, Science

Definition

What is it?

Metres per second (m/s) is a way to measure speed. It tells us how many metres an object travels in one second. It helps us understand how fast something is moving.

Simple Example

Quick Example

Imagine an auto-rickshaw driving on a road. If the auto travels 10 metres in just 1 second, its speed is 10 metres per second (10 m/s). This helps us compare how fast different autos are moving.

Worked Example

Step-by-Step

PROBLEM: A delivery boy on a bicycle covers a distance of 100 metres in 20 seconds. What is his speed in metres per second (m/s)?
---STEP 1: Identify the given values.
Distance = 100 metres
Time = 20 seconds
---STEP 2: Recall the formula for speed.
Speed = Distance / Time
---STEP 3: Substitute the values into the formula.
Speed = 100 metres / 20 seconds
---STEP 4: Perform the division.
Speed = 5 metres per second
---ANSWER: The delivery boy's speed is 5 m/s.

Why It Matters

Understanding m/s is crucial in many fields. Scientists use it to track satellites, engineers use it to design safe vehicles, and even game developers use it to make characters move realistically in games. It's a fundamental concept for future careers in Physics, Computing, and AI.

Common Mistakes

MISTAKE: Students sometimes divide time by distance (Time/Distance). | CORRECTION: Always remember the formula is Speed = Distance / Time. Distance comes first!

MISTAKE: Confusing m/s with km/h (kilometres per hour). | CORRECTION: m/s measures speed in metres and seconds, while km/h uses kilometres and hours. They are different units for different situations.

MISTAKE: Forgetting to include the units (m/s) in the final answer. | CORRECTION: Always write 'm/s' after your numerical answer to show what unit of speed you are using.

Practice Questions

Try It Yourself

QUESTION: A train travels 500 metres in 50 seconds. What is its speed in m/s? | ANSWER: 10 m/s

QUESTION: If a child runs at a speed of 3 m/s, how much distance will they cover in 15 seconds? | ANSWER: 45 metres

QUESTION: An athlete runs 200 metres in 25 seconds. Another athlete runs 400 metres in 60 seconds. Who is faster and by how much (in m/s)? | ANSWER: The first athlete is faster by 1.33 m/s (approx). (First athlete: 8 m/s, Second athlete: 6.67 m/s)

MCQ

Quick Quiz

Which of the following describes a speed of 5 m/s?

Travelling 5 metres in 5 seconds

Travelling 1 metre in 5 seconds

Travelling 5 metres in 1 second

Travelling 10 metres in 1 second

The Correct Answer Is:

5 m/s means 5 metres covered in 1 second. Option A is 1 m/s, Option B is 0.2 m/s, and Option D is 10 m/s.

Real World Connection

In the Real World

When you track a delivery from Zomato or Swiggy, the app often estimates the arrival time based on the delivery rider's average speed, which is calculated using distance and time. Similarly, ISRO scientists calculate the speed of rockets and satellites in m/s to ensure they reach their correct orbits.

Key Vocabulary

Key Terms

SPEED: How fast an object is moving | DISTANCE: How far an object travels | TIME: The duration of an event | UNIT: A standard measure for a quantity

What's Next

What to Learn Next

Great job learning about m/s! Next, you can explore 'Converting Units of Speed' where you'll learn how to change m/s into km/h and vice-versa. This will help you understand different speed measurements even better!