An electron is accelerated from rest through a potential difference of 4.55 kv. it enters a region where a uniform 4.4-mt magnetic field is perpendicular to the velocity of the electron. calculate the radius of the path this electron will follow in the magnetic field. (e = 1.60 x 10^-19 c, mass electron = 9.11 x 10^-31 kg)

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.

What is an electric motor? explain its operation. 2-3 sentence