A football is thrown in a parabolic path. Tell where the acceleration will be parallel and perpendicular to velocity. @LarsEighner , @SchoolKid , @No.name

Question

ganeshie8 · Answer

http://home.comcast.net/~steve_tech01/Qtr1Files/images/pm_1.jpg

ganeshie8 · Answer

red arrows are velocity
green arrows are acceleration

cp9454 · Answer

when they will be parallel.

ganeshie8 · Answer

never

ganeshie8 · Answer

notice that the acceleration is always pointing vertically down. 
can the football ever go in that direction in a projectile motion ?

vincent-lyon.fr · Answer

ganeshie8 is right.
In a true parabolic motion, acceleration and velocity are never parallel.