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What is a Slow Down (Reduce Speed)?
Grade Level:
Pre-School – Class 2
All domains without exception
Definition
What is it?
To slow down means to reduce the speed at which something is moving or happening. It means making something go less fast. When you slow down, you are decreasing your pace or velocity.
Simple Example
Quick Example
Imagine you are riding your bicycle very fast to reach school. Suddenly, you see a speed breaker or a cow in the middle of the road. You press your brakes to reduce your speed, which means you slow down your bicycle.
Worked Example
Step-by-Step
Let's say a car is travelling at 60 kilometres per hour (km/h) on a highway.
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The driver sees a traffic jam ahead and decides to reduce the car's speed.
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They apply the brakes and gently take their foot off the accelerator.
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The car's speed gradually drops from 60 km/h to 30 km/h.
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This change from 60 km/h to 30 km/h is an example of the car slowing down.
Why It Matters
Understanding 'slow down' is crucial in science for topics like motion and forces, and in maths for understanding rates of change. Engineers use this concept to design safe vehicles and traffic systems. Pilots and train drivers constantly use this to ensure passenger safety.
Common Mistakes
MISTAKE: Thinking 'slowing down' means stopping completely. | CORRECTION: Slowing down means reducing speed, but not necessarily coming to a complete stop. You can slow down from 50 km/h to 20 km/h without stopping.
MISTAKE: Confusing 'slowing down' with 'speeding up' (accelerating). | CORRECTION: Slowing down is the opposite of speeding up. Speeding up means increasing speed, while slowing down means decreasing speed.
MISTAKE: Believing that only vehicles can slow down. | CORRECTION: Many things can slow down – a person walking, a process like cooking, or even the flow of water in a pipe. It applies to anything that has a pace or rate.
Practice Questions
Try It Yourself
QUESTION: A train is moving at 100 km/h. It then reduces its speed to 60 km/h. Has the train slowed down or sped up? | ANSWER: The train has slowed down.
QUESTION: Your friend is running a race at a constant speed. Towards the end, they feel tired and start to run less fast. What are they doing? | ANSWER: They are slowing down.
QUESTION: An auto-rickshaw driver is going at 40 km/h. They see a red light and apply brakes, bringing the speed down to 10 km/h before stopping completely. Describe the changes in speed. | ANSWER: The auto-rickshaw first slowed down from 40 km/h to 10 km/h, and then slowed down further to a complete stop.
MCQ
Quick Quiz
Which of the following is an example of slowing down?
A car increasing its speed from 30 km/h to 50 km/h
A person walking at the same pace for 10 minutes
A bicycle decreasing its speed from 20 km/h to 10 km/h
A rocket launching into space
The Correct Answer Is:
C
Option C describes a decrease in speed, which is the definition of slowing down. Options A and D describe increasing speed, and Option B describes constant speed.
Real World Connection
In the Real World
When you use navigation apps like Google Maps or Ola/Uber, the app often tells the driver to 'slow down' as they approach a turn, a traffic signal, or their destination. This helps ensure safe and timely arrival, avoiding sudden jerks or accidents.
Key Vocabulary
Key Terms
SPEED: How fast something is moving | REDUCE: To make something smaller or less | VELOCITY: Speed in a particular direction | BRAKES: A device used to slow down or stop a vehicle
What's Next
What to Learn Next
Now that you understand slowing down, you can explore concepts like 'Speeding Up (Acceleration)' which is the opposite. You can also learn about 'Constant Speed' and how to calculate average speed.
