You are in lab class, recording your observations. Your lab partner brings a negatively charged metal rod close to an uncharged metal ball hanging from a string, approaching the ball from the right. Without physically touching the hanging ball, the ball moves to the right towards the rod. When you bring the rod closer, it touches the ball, and then immediately the ball moves away from the rod, as far away from the rod as the string allows. a.) Sketch and describe using words the charge distribution on the ball in the presence of the rod, before the rod comes into contact with the metal ball. b.) Using the sketch of charges you made, explain why the ball moves to the right towards the rod (before there is any contact between the ball and the rod). Specifically include a discussion of the net force on the ball. c.) Explain what happens when the ball touches the rod, and why the ball then moves away from the rod. Specifically include a discussion of the net force on the ball.
You are in lab class, recording your observations. Your lab partner
brings a negatively charged metal rod close to an uncharged metal
ball hanging from a string, approaching the ball from the right.
Without physically touching the hanging ball, the ball moves to the
right towards the rod. When you bring the rod closer, it touches
the ball, and then immediately the ball moves away from the rod,
as far away from the rod as the string allows.
a.) Sketch and describe using words the charge distribution on the
ball in the presence of the rod, before the rod comes into contact with the metal ball.
b.) Using the sketch of charges you made, explain why the ball moves to the right towards the rod (before
there is any contact between the ball and the rod). Specifically include a discussion of the net force on
the ball.
c.) Explain what happens when the ball touches the rod, and why the ball then moves away from the
rod. Specifically include a discussion of the net force on the ball.
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