Make the idea your own
- 1Choose a speed and run duration.
- 2Press Play or use Step to advance the cart.
- 3Compare the travelled distance with speed multiplied by elapsed time.
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Class 9 · Physics
Race against the clock
Interactive explanation Gamified quiz, feedback & rewards
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NCERT chapter connection · Learning goals & preparation
By the end, you can…
- Explain distance = speed × elapsed time
- Change one input at a time and predict its effect before checking the model.
- Apply the relationship in a quiz and explain the reasoning behind your answer.
Useful preparation: Units, measurement and proportional reasoning.
Exploration · Describing Motion Around Us
NCERT ePathshala current chapter index · checked 12 Nov 2026. This activity explores part of the chapter; it does not replace the textbook. Open official NCERT reference ↗
Hands-on explainer · Class 9
Race against the clock
Class 9
CLASS 9 · CONCEPT QUEST
Turn understanding into a small adventureRace against the clock
Discover the rule, predict what happens, then solve a hands-on mission.
DiscoverFind the idea→PredictThink it through→BuildMake it click
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The relationshipdistance = speed × elapsed time
Explain the experiment
When the goal is met: At 4 m/s, five seconds gives 20 m. The cart covers equal distances in equal time intervals.