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NEET Sample Paper NEET Sample Test Paper-57

  • question_answer
    A particle having a mass 0.5kg is projected under gravity with a speed of 98m/s at an angle of\[{{60}^{{}^\circ }}\]. The magnitude of the change in momentum in N/sec of the particle after 10 sec is:

    A) 0.5                               

    B) 49     

    C) 98                                

    D) 490

    Correct Answer: B

    Solution :

    [b] By Newton's second law of motion \[\overrightarrow{F}{{ & }_{net}}=\frac{dp}{dt}\] Change in momentum = Impulse \[\overrightarrow{F}{{ & }_{net}}=dt\] \[=mg\times time\] \[=0.5\times 9.8\times 10\] \[=49\text{ }N-s\]


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