1. The problem statement, all variables and given/known data I am trying to find out if force in newtons can be negative. If i know the magnitude of decelaration of a car ( a minus acceleration ) and i know the mass, do i multiply the - acceleration value by the mass, resulting in a minus value in newtons, or do i multiply the mass by the deceleration, resulting in a positive value in newtons. 2. Relevant equations for example, 1500kg ( mass ) x -2 m s-2 ( acceleration ) = -3000 newtons 3. The attempt at a solution I think this would be correct because the minus is telling us the direction in which the force is being applied, but i really am not sure, any advice would be appreciated?