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A force acts on a 30 gm particle in such a way that the position of the particle as a function of time is given by 3 2 4 3 t t t x    , where x is in metres and t is in seconds. The work done during the first 4 seconds is

1. 5.28 J
2. 450 Mj
3. 490 mJ
4. 530 mJ

Correct answer: 5.28 J

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