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In abave questions 13 and 14, we have c...

In abave questions ` 13 and 14`, we have carefully distinguished between average speed and magnitude of average velocity. No such distainction is necessary when we considedr speed and magnitude of velocity. The instantneoud speed if alwary equal to the magnitude of nistantaneous velocity. Why ?

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Because, for an arbitrarily small interval of time, the magnitude of displacement is equal to the length of the path.
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NCERT TAMIL-MOTION IN A STRAIGHT LINE-EXERCISES
  1. A drunkard walking in a narrow lane takes 5 steps forward and 3 steps ...

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  2. A jet airplance travelling at the speed of 500 km ^(-1) ejects its pr...

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  3. A car moving along a straight highway with speed of 16 kmh^(-1) is bro...

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  4. Two trains A and B of length 400 m each are moving on two parallel tra...

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  5. On a two lane road , car (A) is travelling with a speed of 36 km h^(-...

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  6. Two towns A and B are connected by a regular bus service with a bus le...

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  7. A player throwsa a ball upwards with an initial speed of 29.4 ms^(-1)...

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  8. Read each staremnt below carefully and state with reasons and expample...

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  9. A ball is dropped from a height of a height of 90 m on a floor. At eac...

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  10. Explain clearly, with ezamples, the difference between : (a) magnitu...

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  11. A man walks on a straight road from his home to a moardet 3 km away wi...

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  12. In abave questions 13 and 14, we have carefully distinguished betwee...

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  13. Look at the graphs (a) to (d) (Fig.) carefully and state, with reasons...

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  14. Find the value of x and y from the figure.

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  15. A police van moving on a highway with a speed of 30 km h^(-1) Fires a ...

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  16. Suggest a suitable physical situation for each of the following graphs...

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  17. Figure. gives the x-t plot of a particle executing one-dimensional sim...

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  18. Figure. gives the x-t plot of a particle in one-dimensional motion. Th...

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  19. Figure. gives a speed-time graph of a particle in motion along a const...

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  20. A three wheeler starts from rest, accelerates uniformly with 1 ms^(-2...

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