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

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 VA – VB.

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