ay Assignment 6 a Number Halliday Fundamentals of Physics 10

ay Assignment 6 (a) Number Halliday, Fundamentals of Physics, 10e University Physics (University Physios) MESSAGE MY INSTRUCTOR FULL SCREEN PRINTER vrRSTON BACK Electron in a well. The figure shows electric potential valong an x axis. The scale of the vertical axis is set by v 8.0 An electron is to be released atx 4.3 am with initial kinetic energy 2.0 ev. (a) If it is initially moving in the negative direction of the axis, it elther reaches a turning point (if so, what is the x coordinate of that point) or it escapes from the plotted region so, what ls its speed at x- 0)? (b) If t is initially moving in the positive direction of the axis, it either reaches a F turning point (if so, what is the x coordinate that point) or it escapes from the plotted region (if so, what is its speed at x 7.0 cm)? What are the (c) magnitude the of the electric on the electron if the to the left of r 4,0 What are (e) F and (f) the direction if it moves just to the right of m 5.0 cm? x (cm) 0 1 2 3 4 5 6 7 (b) Number 3 2.136E-17 (d) (e) Number 1.602E-17

Solution

(a) turning pont x = 1 cm, velocity at x =2 cm is 1.02 x 10⁶ m/s

(b) Turning point x =6 cm, velocity at x=6 cm is 2.08 x 10⁵ m/s

(c) At left from x =4 cm, the magnitude of force = 1.6 x 10^-19 C x 100 V/m = 1.6 x 10^-17 N

(d) negative X axis

(e) At right of x =5 cm, the magnitude of force = 1.6 x 10^-19 C x 50 V/m = 8 x 10^-18 N

(f) negaive X axis