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pat666
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Homework Statement
A proton traveling along the x-axis is slowed by a uniform electric field E. At x = 20 cm, the proton has a speed of 3.5 x 106 ms-1 and at x = 80 cm, its speed is zero. Find the magnitude and direction of electric field intensity.
Can someone please! check my procedure and if your really nice/helpful my answer-----thanks.
Homework Equations
W=Fx
W=Eqx
W=ΔK_E
ΔK_E=1/2 mv^2-1/2 mu^2
The Attempt at a Solution
1st i found the change in energy (work) to slow the proton to a stop. then that's equal to Eqx. I found E to be 1.06*10^5 N/C (positive direction) please check my answer if you have time - its worth marks.