You are on in-line skates at the top of a small hill. Your potential energy is equal to 1,250 J. The last time you checked, your mass was 65.0 kg. If you start rolling down this hill, your potential energy will be converted to kinetic energy. When you are 1.5 m from the bottom of the hill, how fast are you going? *

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?