Skills for analyzing processes involving electric force and electric potential energy
An electric cannon, such as shown in Figure 14.15, consists of a 10-kg metal ball with charge +2.0 X 10-4 C compressed into a plastic barrel so that it is 0.10 m from an equally charged object at the closed end of the barrel. The barrel is oriented at 37° with respect to the horizontal. When the ball is released, it shoots 3.0 m along the barrel from its starting position because of the repulsive force between the two charged objects. Determine three physical quantities that describe the motion of the ball after it leaves the barrel.
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