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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class11  >>  Motion in a Straight Line
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A particle starts from the position of rest under a constant acceleration. If travels a distance x in the first 10 seconds and distance y in the next 20 seconds . Then

$\begin{array}{1 1}(A)\;y=x \\(B)\;y=2x\\(C)\;y=9x \\(D)\;y=4x \end{array} $

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$x=\large\frac{1}{2}$$ a (10)^2 =\large\frac{1}{2} $$a(100)$
$x+y =\large\frac{1}{2} $$ a(30)^ 2 =\large\frac{1}{2} $$a (900)$
$\qquad= 9x$
Hence c is the correct answer.
answered Jul 10, 2014 by meena.p

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