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![[Post New]](/templates/default/images/icon_minipost_new.gif) 30 May 2007 10:57:41 IST
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A football is thrown in a parabolic path. Is there any point at which the acceleration is parallel to the velocity?Perpendicular to the velocity? Please answer  |
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30 May 2007 11:08:42 IST
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at highest point acceleration will be perpendicular but not any where will be parllel to velocity
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30 May 2007 11:11:21 IST
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velocity will be perpendicular to acc. at top.. and nowhere parallel..
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30 May 2007 11:16:05 IST
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In case of a projectile the force acting on the ball is only and only mg (neglecting the air drag) so the net acceleration is also in the downward direction ... always.
However the velocity keeps on changing evey instant. At the highest point is parrallel to the plane and hence perpendicular to the dir. of acceleration.
The velocity is never parrallel to dir of acceleration unless it is thrownn directly upwards (not a projectile)/
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