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.

Intro: a solid ball of radius rb has a uniform charge density ρ. part a: what is the magnitude of the electric field e(r) at a distance r> rb from the center of the ball? express your answer in terms of ρ, rb, r, and ϵ0. part b: what is the magnitude of the electric field e(r) at a distance r express your answer in terms of ρ, rb, r, and ϵ0. part c: let e(r) represent the electric field due to the charged ball throughout all of space. which of the following statements about the electric field are true? check all that apply. e(0) = 0 e(rb)=0 limr→∞e(r)=0 the maximum electric field occurs when r=0 the maximum electric field occurs when r=rb the maximum electric field occurs as r→∞.