Question

Multiple-Concept Example 4 deals with the concepts that are important in this problem. As illustrated in the figure, a negatively charged particle is released from rest at point B and accelerates until it reaches point A. The mass and charge of the particle are 2.75 x 10-4 kg and -1.46 x 10-5 C, respectively. Only the gravitational force and the electrostatic force act on the particle, which moves on a horizontal straight line without rotating. The electric potential at A is 36.0 V greater than that at B; in other words, VA - VB = 36.0 V. What is the translational speed of the particle at point A?

Answer 1

Kinetic Enugy of particle a qu I mu? VV -> 2qV 2 2 2x1.46x105x 36 2.75 x 154 (2 1.955 m/see.