Chris runs around a circular track with a radius of 39 meters. he makes five trips around the track in 220 seconds. a. what is the circumference of the track? b. how many meters does he run? c. what is his angular speed? d. what is his linear 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.