1. A student dropped a ball from the top of a table. The ball's motion was recorded by a motion sensor above the ball. The following data were
recorded. What most likely happened after 0.5 s? (P.4A).
Time (s)
0
Distance (m)
0
.05
.1
2
.3
.20
.45
.80
.4
.5
.80

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?