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NEET Sample Paper NEET Sample Test Paper-66

  • question_answer
    The engine of a jet aircraft applies a thrust force of \[{{10}^{5}}N\] during take-off and causes the plane to attain a velocity of 1 km/sec in 10 sec. The mass of the plane is

    A) \[{{10}^{2}}\,kg\]                   

    B) \[{{10}^{3}}\,kg\]

    C) \[{{10}^{4}}\,kg\]                   

    D) \[{{10}^{5}}\,kg\]

    Correct Answer: B

    Solution :

    Acceleration produced in jet \[=\,\,\frac{Change\,\,in\,\,velocity}{Time}\] \[a\,\,=\,\,\frac{({{10}^{3}}-0)}{10}\,\,=\,\,100\,m/{{s}^{2}}\] \[\therefore \,\,\,\,Mass\,\,=\,\,\frac{Force}{Acceleration}\,\,=\,\,\frac{{{10}^{5}}}{{{10}^{2}}}\,\,=\,\,{{10}^{3}}\,kg\]


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