PHY 114 Warm-Up

Reading: Chapter 22 sections 1-3

This Warmup is due Thursday 1/16

Remember - Your student id number is the first 8 digits on your id

Only submit your answers once

Name:

Student ID#

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q1 - What are the similarities and differences between Newton's law of Gravity and Coulomb's law?

q2 - How do you charge something by induction and what charge does the object have with respect to the charging rod after it is charged?

q3 - Which of the following is false? The electric force

decreases with the inverse of the square of the distance between two charged particles.

between an electron and a proton is much stronger than the gravitational force between them.

between two protons separated by a distance d is larger (in absolute magnitude) than that between two electrons (also in absolute magnitude) separated by that same distance d.

may be either attractive or repulsive.

Below is a space for your thoughts, including general comments about today's assignment (what seemed impossible, what reading didn't make sense, what we should spend class time on, what was "cool", etc.): (If you don't mind, please include your e-mail address for quick replies from Prof. Kim-Shapiro - this is optional)

Daniel Kim-Shapiro, Department of Physics, Wake Forest University, Winston-Salem, NC 27109, U.S.A.
shapiro@wfu.edu