Help me find Response Impulse from this differential equation

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?

How can a cyclist's acceleration change even if its velocity remains constant?

Apendulum has 387 j of potential energy at the highest point of its swing. how much kinetic energy will it have at the bottom of its swing?