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- An object may not move at the same speed throughout.
- It might move slower or faster at different times.
- The speed we calculate using total distance ÷ total time is the average speed .
- In this book, "speed" usually means "average speed".
📋 NCERT Question 11 (Multi-concept)
⚡ This question covers multiple concepts. Make sure you have understood all sections above before attempting.
A vehicle moves along a straight line and covers a distance of 2 km. In the first 500 m, it moves with a speed of 10 m/s and in the next 500 m, it moves with a speed of 5 m/s. With what speed should it move the remaining distance so that the journey is complete in 200 s? What is the average speed of the vehicle for the entire journey?
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