(Re-posted with v= 4 x 10^3 NOT NOT 4 x 103 m/s)
OK.....the y velocity is .0135/t where t is the time it took to travel 56 cm at (4 x 10^3m/s) = .56/4000
.0135/ (.56/4000) = ( .0135 x 4000) /.56 = 96.429 m/s
This velocity change from ZERO to this value occured in the time it took to cover the plate length of 26cm (.26m) at 4 x 10^3 m/s.
.26/4000 = 6.5 x10^5 seconds
Acceleration in the y direction is thus the change in
velocity/time = (96.429)/.6.5 x 10^-5 = 1483523 m/s^2
Since F= ma Thus the force is 1483523 ( m )
Lorentz force law : F= q(E+ v x B) = 1483523 m divide both sides by m
q/m (E + v x B) = 1483523
q/m = 1483523/ (E + v x B) We are given E and v which we can substitute....but we still do not have 'B' the magnetic flux density......hmmmmm .... NOW I'M STUCK! Wonder if I was given all of the information?
Think I might be on the wrong path???