Mary asks…Physics Question (Gravity)?-9.81 and 9.81
which do you use and when? (for basic velocity, distance formulas)Nancy answers:Positive 9.81 is used to represent acceleration due to gravity. Negative 9.81 is used to represent deceleration due to gravity. In other words, use 9.81 for basic questions. -9.81 isn't used very often until you get into the more complicated physics questions.Linda asks…Need help deriving a physics formula?Derive a general formula for the horizontal distance
