A Proton Initially Moves Left to Right Long the X

question 62

Multiple Choice

A proton initially moves left to right long the x axis at a speed of 9.00 × 10³ m/s.It moves into an electric field,which points in the negative x direction,and travels a distance of 0.900 m before coming to rest.What acceleration magnitude does the proton experience?
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• A) 9 × 10³ m/s²
• B) 4.5 × 10⁷ m/s²
• C) 2.25 × 10⁹ m/s²
• D) 18 × 10¹¹ m/s²
• E) 40.5 × 10⁸ m/s²

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