From The Physics Classroom's Physics lnteractives http:wwwphysiesclassroom.com The Law of Electrostatic Force Purpose: The purpose of this activity is to determine the law of electrostatic force - that is, to determine the relationship between the force of attraction or repulsion between two charges and the factors that affect this force. Getting Ready: Navigate to the Coulomb's Law Interactive at The Physics Classroom website: http:wawphysicsclassroom.comfPhysics-InteractivesfStatic-Electricityr'Coulomb-s-Law Navigational Path: www.physicsclassroom.com ==> Physics Interactives ==> Static Electricity ==> Coulomb's Law PW" 5\" Once you've launched the Interactive, resize it to the size that you would like it to be. Then begin experimenting with . -. the interface. Observe that the two charged objects can be m dragged about the screen and centered on the gridlines of the background grid. Observe that the ruler can also be dragged about the screen. Observe how the sliders can also be dragged to change the value of the quantity of charge upon each charge. Finally, observe how the value of the electrostatic force between objects is displayed in the upper right of the simulation window. Challenge #1 How is electrostatic force (Felect) related to Charge on 1 Force the magnitude of charge on the two objects 2 Felec (ql and (12)? Keeping the same separation _ distance for all trials, systematically alter the charges of the objects and record the force. _ Be systematic and use purposeful changes such as doubling, tripling, and quadrupling of _ Make a claim describing the relationship _ between Felm and q1 and ([2. Support your - claim with evidence (references to the data) __- and reasoning. From The Physics Classroom's Physics lnteraetives http:l/wwwphysiesclassroom.eom Challenge #2 _ How is the electrostatic force (Felect) related to the separation distance (d) the two charges? Keeping the magnitude of charge Distance d F319\" on both objects constant, conduct a systematic study to collect _- data relating separation distance to force. The separation distance is dened as the distance between the centers of the two objects; the best strategy involves centering the objects on a gridline and using distances that are a whole number of squares. Make a claim describing the relationship between Felm and (I. Support your claim with evidence (references to the data) and reasoning. Conclusion: Suggest an equation relating Fm\