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9.0

Sign of g in these equations

Asked by keishuuamuro in Math & Science

Hi,
I'm trying to come up with an equation to describe that relates the distance a ball is dropped from a height of H that hits a plate at a 45 degree angle and then goes off on a parabolic path to a distance of R (basically Height between ball and bounce plate vs. range). I'm a little confused for what the sign of g (the ball's acceleration) would be as the ball goes through its motion. I figured that when its dropped to hit the plate the sign is negative, but when its in the parabolic path is it positive?

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20091021-EE-VQP-81 / EE_QW_2_20070628

Sign of g in these equations

Asked by keishuuamuro in Math & Science

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