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Fireburntbudder
20.08.2019 •
Physics
Asmall ball of charge q and mass m has a velocity v at infinity. it collides head-on with a ball of the same charge and mass which is initially at rest. what is the minimal distance between the charges during the collision?
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Ответ:
Explanation:
Kinetic energy of ball in motion = 1/2 m v² . Potential energy = 0
Let the minimum distance between the balls be d on collision.
Electric potential energy at that time= k Q²/d , Here kinetic energy is converted into potential energy . So
1/2 m v² = kQ²/d
d =2 k Q² / mv²,= 18 x 10⁹ x Q²/ m v².
Ответ:
c) russian troops won several battles but suffered extremely heavy casualties
Explanation: