Diane and Elsie are on the roof. If Elsie drops a ball from the top and it falls at a rate of 10m/s^2n and is falling for 6 seconds. What is the final velocity of the ball?

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?