Khan/khan-exercises — Issue #14738: Kinematic equations - My answer is correct
Author: KhanBugz
Created: 2012-02-27 17:12:19+00:00
State: open
Labels: lion, safari, wrong-or-unclear

Reporter: tennyson.mccalla@gmail.com

Because negative time makes no sense as an answer, negative final velocity is the only option. And if 44.9 and 44.8 are acceptable (negative and positive respectively) then their inverses should also be acceptable. The answer is actually -44.85 m/s, which rounds the way I've rounded it.

[kinematic_equations.html?seed=98&problem=accelerated](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/kinematic_equations.html?seed=98&problem=accelerated&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/kinematic_equations.html?seed=98&problem=accelerated&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5B%5C%22-44.9%5C%22%2C%5C%22m%2Fs%5C%22%5D%5D%22%2C1072%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%5D)

[[["-44.9","m/s"]]]

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