3. Two plastic ping-pong balls are suspended by two threads. The ping-pong ball on the left is negatively charged. Is the ping-pong ball on the right positive or negative, or neutral? Explain. negatively charged plastic sphee other plastic sphere
3. Two plastic ping-pong balls are suspended by two threads. The ping-pong ball on the left is negatively charged. Is the ping-pong ball on the right positive or negative, or neutral? Explain. negatively charged plastic sphee other plastic sphere
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Transcribed Image Text:3. Two plastic ping-pong balls are suspended by two threads. The ping-pong ball on the left is
negatively charged. Is the ping-pong ball on the right positive or negative, or neutral? Explain.
negatively
charged
plastic
other plastic
sphere
sphere
4. Now, instead of considering
the changes in energy of a
block, consider the changes in
energy of a charge.
Imagine that a proton is placed
close to a metal plate that is
positively charged, as in the
figure. To the right of the
proton is another metal plate,
which is negatively charged.
proton
(a) Will the proton naturally stay where it is after it is placed there? Or will it want to move?
Explain.
(b) Describe the changes in energy that happen just after the proton is placed at the plate.
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