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 Discussion Response Post to:
1D
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 24 May 2007 15:28:05 IST
Accepted Answer [?]
![[Up]](/templates/default/images/icon_up.gif "[Up]")
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im telling u a good way of solving such questions
we take v=(ucosQ) i + (usinQ-gt) j
i,j are unit vectors to x,y axis
Q is angle made with the ground
and the point from where the particle is thrown as origin
so the equation of the
inclined plane in 2-D is
y=(1/sqrt(3))x
we tale vector m=cos 30 i +sin 30 j
this is unit vector along plane
we know the angle at which it hits the plane
wetake dot product of v and m
v.m=|v||m|cosF
where F is the final angle at which it hits the plane
hope u get it!!
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this reply: 7 points
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