A marble rolls down from top of a staircase with constant horizontal velocity u.If each step is y metre high and x metre wide, the marble just hits the edge of the nth step when n =
Text Solution
Verified by ExpertsThe correct answer is:
C
Total horizontal distance to be covered = x × n = nx.
But nx = ut ……….. (i)
and ny = 1/2 gt 2 …………. (ii)
Substituting the value of t from (i) in (ii),
ny = 1/2 g n 2 x 2 /u 2
or n = 2yu 2 /gx 2
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