What is the final velocity of a ball thrown downward at 10 m/s after 2 seconds?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

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.