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J & K CET Medical J & K - CET Medical Solved Paper-2014

  • question_answer
    A constant retarding force of 80 N is applied to a body of mass 50 kg which is moving initially with a speed of 20 m/s. What would be the time required by the body to come to rest?

    A)  15s  

    B)  14s  

    C)  12.5s

    D)  18s

    Correct Answer: C

    Solution :

     Here, \[a=\frac{F}{m}=\frac{80}{50}=1.6\,m/{{s}^{2}}\] \[u=20\,m/s\]and\[v=0\] From \[v=u+at\] \[0=20-1.6\times t\] \[t=\frac{20}{1.6}=12.5s\]


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