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A particle moves in one dimension from rest under the influence of a force that varies with the distance travelled by the particle as shown in the figure. The kinetic energy of the particle after it has travelled 3m is –

(1) 2.5 J  (2) 6.5 J  (3) 4 J  (4) 5 J

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Correct option (2) 6.5 J

Explanation:

1/2  mV2 = 4 + 2 + 0.5 = 6.5 J

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