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Three girls skating on a circular ice gr...

Three girls skating on a circular ice ground of radius ` 200 m` start from a point (P) on the edge of the ground and reach a point ` Q` diametrically opposite to (P) following different paths as shown in Fig. (NCT) . 17. What is the magnitude of the displacement vector for each ? which girl's displacement is equal to the actual length of path skated ?
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400 m for each ; B
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NCERT TAMIL-MOTION IN A PLANE-EXCERCISES
  1. Establish the following inequalities geometrically or otherwise , (...

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  2. Given vec A + vec B+ vec C + vec D =0, which of the following stateme...

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  3. Three girls skating on a circular ice ground of radius 200 m start fr...

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  4. A cyclist starts from the centre 'O' of a cicular park of radius 1 km,...

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  5. On an open ground , a motorist follows a track that turns to his left ...

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  6. A passenger arriving in a new town wishes to go from the station to a ...

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  7. Rain is falling vertically with a speed of 30 ms^(-1) . A woman rides...

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  8. A man can swim with a speed 4km/hr in still water. (a) How long does...

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  9. In a harbour, wind is blowing at the speed of 72 km //h and the flag ...

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  10. The ceiling of a long hall is 25 m high. What is the maximum horizonta...

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  11. A cricketer can throw a ball to a maximum horizontal distance of 100 m...

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  12. A stone tied to the end of a string 80 cm long is whirled in a horizon...

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  13. An aircraft executes a horizontal loop of radius 1 km with a steady sp...

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  14. Read each statement below carefully and state, with reasons, if it is ...

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  15. The position of a particle is given by r=3.0thati-2.0t^(2)hatj+4....

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  16. A particle starts from the origin at t=Os with a velocity of 10.0 hatj...

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  17. hati and hatj are unit vectors along x-axis and y-axis respectively wh...

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  18. For any arbitrary motion in space, which of the following relations ar...

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  19. Read each statement below carefully and state with reason and examples...

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  20. An aircraft is flying at a height of 3400 m above the ground. If the a...

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