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MGIMS WARDHA MGIMS WARDHA Solved Paper-2005

  • question_answer
    An arrow is shot into in. its range is 200 m and its time of flight is 5 s. If \[g=10\,m/{{s}^{2}},\]then  the   horizontal component of velocity of the arrow is :

    A)  12.5 m/s                             

    B) 250 m/s

    C) 31.25 m/s                           

    D) 40 m/s

    Correct Answer: D

    Solution :

    R angle=\[=\frac{{{u}^{2}}\sin 2\theta }{9}=200m\] Or           \[\frac{{{u}^{2}}(2\sin \theta \cos \theta }{9}=200m\]                    ?.(1) Flight time\[=\frac{2u\sin \theta }{9}=5\text{ }\sec \]                      ... (2) From equation (1) and (2) \[u\cos \theta =40m/s\]


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