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February 28, 2015

Homework Help: physics

Posted by mo on Friday, September 16, 2011 at 12:25pm.

ok i have a problem to work on in my new course, and i was wondering what i need to do to tackle it. the question is as follows:

An electron is projected with an initial velocity Vo=10^7m/s into the uniform field between the parallel plates "E". the direction of the field is vertically downward and the field is zero everywhere else except between plates. the electron enters the field at a point midway the plates. if the electron just misses the upper plate as it uses energy from the field, find the magnitude of the field "E"

are these the formulas needed
F = ma = qE
s = ut + 0.5 at^2
v = u + at
v^2 = u^2 + 2as

and what does ( a, u, and s) stand for?

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