This is a remarkably large ratio! Note that this will be the ratio of electrostatic force to gravitational force for an electron and a proton at any distance, taking the ratio before entering numerical values shows that the distance cancels. 3.C.2.2 The student is able to connect the concepts of gravitational force and electric force to compare similarities and differences between the forces.3.C.2.1 The student is able to use Coulomb's law qualitatively and quantitatively to make predictions about the interaction between two electric point charges-interactions between collections of electric point charges are not covered in Physics 1 and instead are restricted to Physics 2.3.A.3.4 The student is able to make claims about the force on an object due to the presence of other objects with the same property: mass, electric charge.3.A.3.3 The student is able to describe a force as an interaction between two objects and identify both objects for any force.The information presented in this section supports the following AP® learning objectives and science practices: Compare the electrostatic force to the gravitational attraction for a proton and an electron for a human and Earth.
Calculate the electrostatic force between two point charges, such as electrons or protons.State Coulomb's law in terms of how the electrostatic force changes with the distance between two objects.By the end of this section, you will be able to do the following:
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