JEE Main & Advanced Physics Motion in a Straight Line / सरल रेखा में गति Question Bank Critical Thinking Questions

  • question_answer
    If a ball is thrown vertically upwards with speed \[u\], the distance covered during the last \[t\] seconds of its ascent is                                                                                                          [CBSE PMT 2003]

    A)             \[\frac{1}{2}g{{t}^{2}}\]   

    B)             \[ut-\frac{1}{2}g{{t}^{2}}\]

    C)             \[(u-gt)t\]         

    D)             \[ut\]

    Correct Answer: A

    Solution :

                    The distance covered by the ball during the last t seconds of its upward motion = Distance covered by it in first t seconds of its downward motion From\[h=ut+\frac{1}{2}g\,{{t}^{2}}\] \[h=\frac{1}{2}g\ {{t}^{2}}\]                [As u = 0 for it downward motion]


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