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## Homework Statement

Find the force necessary to give a proton an acceleration of 1.0 10e19 m/s2 when the proton has the following velocities (along the same direction as the force).

## Homework Equations

P=mλu

## The Attempt at a Solution

Found the derivative of the above equation and got F=mλa, but my answers are been rejected by the school software. I don't know what I did wrong please help.