A Proton Initially Moves Left to Right Long the X

question 49

Multiple Choice

A proton initially moves left to right long the x axis at a speed of 2.00 *10⁴ m/s. It moves into an electric field, which points in the negative x direction, and travels a distance of 0.200 m before coming to rest. What acceleration magnitude does the proton experience?

• A) 2.67 * 10¹² m/s²
• B) 9.33 * 10⁹ m/s²
• C) 6.67 * 10⁶ m/s²
• D) 1.00 * 10⁹ m/s²