A) 12.5 m/s
B) 5m/s
C) 3.7 m/s
D) 2.5 m/s
Correct Answer: D
Solution :
Here : Mass of ship \[m=2\times {{10}^{7}}kg,\] Force \[F=25\times {{10}^{5}}N\] Displacement \[s=25\text{ }m\] According the Newtons second law of motion \[F=na\] or \[a=\frac{F}{m}=\frac{25\times {{10}^{5}}}{2\times {{10}^{7}}}\] \[=12.5\times {{10}^{-2}}m/{{s}^{2}}\] The relation for find! velocity is \[{{\upsilon }^{2}}={{u}^{2}}+2as\] or \[{{\upsilon }^{2}}=0+2\times (12.5\times {{10}^{-2}})\times 25\] or \[\upsilon =\sqrt{6.25}=2.5m/s\]
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