Tina and her puppy are tugging on a rope, each pulling on opposite ends.

when is tina doing work?

a. the entire time she plays with the puppy
b. whenever she pulls the puppy toward her
c. when she holds the rope steady as the puppy pulls it
d. when she lets go of the rope and the puppy pulls it away

Where do magnetic lines of force enter earth?

What are the necessary conditions for fusion?

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.