You throw a baseball at a 45° angle to the horizontal, aiming straight at a friend who’s sitting in a tree a distance h above level ground. at the instant you throw your ball, your friend drops another ball. (a) show that the two balls will collide, no matter what your ball’s initial speed, provided it’s greater than some minimum value. (b) find an expression for that minimum speed.

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.