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Motion in a Straight Line
Two diamonds begin a free fall from rest from same height $1.0 \; sec$ apart How long after will the two diamonds be 10 m apart ? $(g=10 m/s)$
\[(a)\;2\;sec \quad (b)\;1.5 \;sec \quad (c)\;1\;sec \quad(d)\;2.5 \;sec \]
jeemain
physics
class11
unit2
kinematics
motion-in-a-straight-line
kinematic-equation-for-accelerated-motion
medium
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asked
Jul 2, 2013
by
meena.p
retagged
Aug 12, 2014
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1 Answer
We have
$S_1(t)-S_2(t-1)=10$
$\large\frac{1}{2}$$ \times gt^2-\large\frac{1}{2}$$ g(t-1)^2=10$
$t=1.5 \;sec$
Hence b is the correct answer.
answered
Jul 2, 2013
by
meena.p
edited
Jan 26, 2014
by
meena.p
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