Christopher Robin pushes on a 1500 N (weight) crate with a force of 500 N to the right. The crate does not move. What are both the normal force and the force of friction?
A. FN = 500 N Up: FF = 1500 N left
D. EN 1500 N up: FF 500 N right
BFN = 1500 N Up: FF 500 Nleft
C. FN 1500 N down; FF 500 N right

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→∞.