A) \[200\,\,m\,\,{{s}^{-2}}\]
B) \[80\,\,m\,\,{{s}^{-2}}\]
C) \[110\,\,m\,\,{{s}^{-2}}\]
D) \[280\,\,m\,\,{{s}^{-2}}\]
Correct Answer: A
Solution :
Initial velocity of the car \[=40\,\,m\,\,{{s}^{-1}}\], Final velocity of the car\[=0\], Time\['t'=0.2\,\,s\] \[a=\frac{v-u}{t}=\frac{0-40}{0.2}=-200\,\,m\,\,{{s}^{-2}}\] \[\therefore \]Deceleration\[=200\,\,m\,\,{{s}^{-2}}\]You need to login to perform this action.
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