A) \[12\,\,m{{s}^{-2}}\] in north direction
B) \[3\,\,m{{s}^{-2}}\] in north direction
C) \[15\,\,m{{s}^{-2}}\]in north direction
D) \[3\,\,m{{s}^{-2}}\]in south direction
Correct Answer: B
Solution :
Key Idea: Rate of change of velocity is defined as acceleration. Acceleration\[a=\frac{\Delta v}{\Delta t}=\frac{{{v}_{2}}-{{v}_{1}}}{\Delta t}\] Given,\[{{v}_{1}}=10\,\,m/s,\,\,{{v}_{2}}=25\,\,m{{s}^{-1}},\,\,\Delta t=5\,\,s\] \[\therefore \]\[a=\frac{25-10}{5}=3\,\,m{{s}^{-2}}\]in north direction.
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