AFMC AFMC Solved Paper-2003

  • question_answer
    A particle covers 150 m in 8th second starting from rest, its acceleration is:

    A) 15 m/s2                                

    B) 20 m/s2

    C) 10 m/s2                                

    D) 8 m/s2

    Correct Answer: B

    Solution :

    From equation of motion, we have\[s=ut+\frac{1}{2}a(2n-1)\] where u is initial velocity, t is time, a is acceleration and n is the particular second. Since u = 0, we have \[150=0+\frac{1}{2}a(2\times 8-1)=\frac{15a}{2}\] \[\Rightarrow \]    \[a=\frac{300}{15}\,=20\,m/{{s}^{2}}\]


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