# Projectile motion of charged particle 3

The above shows the moving path of a charged particle with quantity of electric charge $$Q,$$ along the three points $$A$$, $$B$$ and $$C$$ on a parabola. The blue dotted lines are isoelectric lines, and the electric potential of the points $$A$$, $$B$$ and $$C$$ are $$2$$ V, $$4$$ V and $$0$$ V, respectively. Which of the following statements is correct? (The force acting on the charged particle is electric force only, and ignore the generaion of electromagnetic waves.)

a) The charged particle has a positive charge.

b) The acceleration of the charged particle at point $$B$$ is zero.

c) The work done by the electric force on the charged particle when it moves from point $$A$$ to point $$C$$ is $$6$$Q.

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