Gizmo Warm-up As clothes are tumbled in a dryer, electrons are  rubbed off some items, giving them a positive charge, and deposited on other items, giving them a negative  charge. These charged items exert electrostatic  forces on one another. You can explore these forces  with the Coulomb Force (Static) Gizmo.  In its initial settings, the Gizmo shows two objects that each have a charge (q) of 10.0 × 10-4 C (coulombs). Turn on the Show force vector checkboxes for objects A and B. The arrows coming from each object are vectors that represent the electrostatic force. The direction and  length of each vector show the direction and magnitude (strength) of each force. Gizmo Are the vectors for objects A and B pointing together or away from each other?*1 pointAwayTogetherAre objects A and B attracted together or repelled apart?*1 pointAttracted togetherRepelled apartCompare the lengths of the vectors. What do you notice?*1 pointA is longer.The vectors are equal in length.B is longer.

1 answer

Based on the information provided about the charges of the objects in the Gizmo, we can analyze the electrostatic forces at play:

  1. Are the vectors for objects A and B pointing together or away from each other?

    • Since both objects A and B have the same charge (+10.0 × 10^-4 C), they will repel each other. Therefore, the vectors will be pointing away from each other.

    Answer: Away

  2. Are objects A and B attracted together or repelled apart?

    • As identified, since both objects have the same positive charge, they will repel each other.

    Answer: Repelled apart

  3. Compare the lengths of the vectors. What do you notice?

    • When two objects have the same charge, the magnitudes of the forces they exert on each other are equal according to Coulomb's law. Therefore, the lengths of the force vectors representing the electrostatic forces between them should be equal.

    Answer: The vectors are equal in length.

In summary:

  • The vectors are pointing away from each other,
  • The objects are repelled apart,
  • The vectors are equal in length.
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