Solving for Speed: Average Net Force & Mass

[uno]

1. A beam consisting of around 1.0 1015 electrons per second, each of mass 9.1 10-31 kg, paints pictures on the face of a TV tube. Assuming that the electrons are absorbed by the screen and exert an average net force on it of 0.9 10-7 N, what is their average speed at impact?



2. Favg = p/t and p=mv



3. These are the two formulas given, but I'm not sure how to solve for speed

 

[heth]

Try starting the problem, and writing down your thought process.

Write and sketch about what you already know from what the problem tells you - then see if you can use that to work out what you don't yet know.