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A ship of mass 3 x 10 ^7 kg initially at rest is pulled by a force of 5 x 10 ^ 4 N through a distance of 3 m. Assume that the resistance due to water is negligible, the speed of the ship is

(a)      1.5 m/s                                      (b)  60 m/s

(c)   0.1 m/s                              (d)  5 m/s

Ans. c

(6)

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