A) \[36\times {{10}^{4}}N\]
B) \[1\times {{10}^{5}}N\]
C) \[36\times {{10}^{7}}N\]
D) \[36\times {{10}^{5}}N\]
Correct Answer: B
Solution :
Given,\[m=1000\,\,kg,\,\,v=72\,\,km/h\]and\[\Delta t=0.2\,\,s\] \[\therefore \] \[{{F}_{av}}=\frac{m{{v}_{av}}}{\Delta t}\] \[=\frac{1000\times 20\times 10}{0.2}\] \[=1\times {{10}^{5}}N\]
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