Underneath the appropriate column of graphs from thinkabout 36.2, write an equation that solves for the variable in question (see below). write which model you used: newtonian force model, energy-interaction model, the momentum conservation model, if you introduce any new variables, clearly indicate what they mean. (a) the velocity of a dropped object just before it hits the floor. (b) the time it takes the dropped object in (a) to reach the floor after being dropped. (c) the change in velocity for a spacecraft firing its rockets for a certain length of time. (d) the speed of the race car after the first 10 seconds.