To study the properties of various particles, you can accelerate the particles w

Question

To study the properties of various particles, you can accelerate the particles with electric fields. A positron is a particle with the same mass as an electron but the opposite charge (+e). Express your answer in vector form. Do not enter units in your expression (a) If a positron is accelerated by a constant electric field E3251 130j - 185 k N/C, find the acceleration of the positron a-| 5.7e13^ _ 2.28e13-3.25e 13k | m/s2 (b) Assuming the positron started from rest, find the velocity of the positron 8.10 x 10-9 s later. Which kinematic equation can you use to find the velocity? m/s

Explanation / Answer

F = qE = ma

acceleration = a = qE/m = 1.76*1011 * (325i - 130j -185k) = (5.7i - 2.28j -3.25k)*1013 m/s /s

V = at = 8.10*10-9 * (5.7i - 2.28j - 3.25k) * 1013 = 4.6*105i - 1.85*105j - 2.63*105k

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