Chapter 17, Problem 45P

Electric accelerator A micro-transporter moves from one side of an evacuated chamber to another It is powered by equal-magnitude, opposite-sign charges Q and –Q on top of two station points (see Figure P17.45). If a $7\times {10}^{-3}-\text{N}$ friction force opposes the transporter’s motion, what must be the magnitude of Q to make the transporter move with an initial acceleration of $1.0m/s^2$? The transporter’s mass is 1.0 g and it is carrying a positive charge of $8\times 10{}^{-10}C$.