An alpha particle (m = 6.7 × 10−²⁷ kg, q = +3.2 × 10−¹⁹ C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle during this motion. Determine the electric potential difference V_A − V_B. A) +4.2 V B) −4.2 V C) −9.4 V D) +9.4 V E) −8.4 V

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The Answer of An alpha particle (m = 6.7 × 10−²⁷ kg, q = +3.2 × 10−¹⁹ C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle during this motion. Determine the electric potential difference V_A − V_B. A) +4.2 V B) −4.2 V C) −9.4 V D) +9.4 V E) −8.4 V

An Alpha Particle (M = 6