Q.

A ship of mass 3 x 107 kg initially at rest is pulled by a force of 5x 104 N through a distance of 3 m. Assuming that the resistance due to water is negligible, what will be the speed of the ship ?

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a

0.1 m/s

b

1.5 m/s

c

5 m/s

d

0.2 m/s

answer is A.

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Detailed Solution

a=Fm=5×1043×107=53×10−3m/s2Now v2=u2+2as or  v2=0+2×(5/3)×10−3×3          v=10−1m/s.
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A ship of mass 3 x 107 kg initially at rest is pulled by a force of 5x 104 N through a distance of 3 m. Assuming that the resistance due to water is negligible, what will be the speed of the ship ?