A4.00-kg mass is attached to a very light ideal spring hanging vertically and hangs at rest in the equilibrium position. the spring constant of the spring is 1.00 n/cm. the mass is pulled downward 2.00 cm and released. what is the speed of the mass when it is 1.00 cm above the point from which it was released?

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.