Coulomb’s Law Activity When charged particles are brought near each other, they interact and result in attraction or repulsion . We can see this in action . 1 . Balloon : Take a balloon and rub it on a shirt or hair. Place the balloon against an object and observe the interaction. a. What happens to the balloon? IJ 7 * * C - I . i **- C In each figure, three charges are fixed in place on a grid, and a point near those particles is labeled P. All of the charges are the same size, Q , but they can be either positive or negative . A B +Q + Q +Q o O o I P * ( C , P +Q + Q +Q o r o 6 : D — d-—X\ - + Q -Q -Q i : P +Q o I +Q ~Q +Q o O © Rank the strength ( magnitude) of the net electric force on a charge + q that is placed at point P . C OR 1 2 3 4 All All Cannot | Greatest Least the same zero determine Explain your reasoning . A / * > kii* V - Ei V* * l v 0 e- Tx “ . 3 i o P x .t s k a c r tis T '* - v " ^ 0 - iv y ( ju K 3. Three charges are fixed at the vertices of each equilateral triangle shown below. All charges have the same magnitude. Only charge 1 is positive. Determine the direction of the net electric force acting on each charge due to the same triangle. Answer by using letters A through L representing directions from the other two charges in the choices below. Net Force Direction + 01 ! Charge j V 0 Q~ 2 3 " 4. 1 Charge 2 ! Charge 3 Net Force Direction c? Charge 4 K Charge 5 c F j A i Charge 6 j A small object with positive charge +Q is fixed in place . A small bead with positive charge +q is released from rest from the position shown above. In the absence of forces other than the electric force, draw what the graph for the acceleration as a function of distance would look like for the +q charge. c o 03 UH Q j

Coulomb's Law Activity

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