Physics 2 for Engineering Week 1: Electric Forces
Physics 2 for Engineering Week 1: Electric Forces PHYS 1155
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This 3 page Class Notes was uploaded by Aubrey Kenderdine on Thursday September 8, 2016. The Class Notes belongs to PHYS 1155 at Northeastern University taught by Latika Menon in Fall 2016. Since its upload, it has received 209 views. For similar materials see Physics for Engineering 2 in Physics at Northeastern University.
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Date Created: 09/08/16
Chapter 21 Electric Charge and Electric Field Electric charge is measured in coulombs (C), and an electron has a charge of 1.6 x 10 C 19 Electric force is the force between charged particles (ex. a proton and an electron) Electric force is another force to know in addition to Normal force, Static and Kinetic Friction force, Gravity force, Tension force, and Buoyancy force all from Physics 1 The magnitude of force on q (a charge particle) by q (another charged particle = the magnitude 1 2 of force on q b2 q 1 The direction of the force depends on the sign of charge (positives retracting, negatives retracting, and opposite charges attracting) Coulomb’s Law F e12kq q /1 2 2 9 2 2 F e12 the electric force on q due 1o q in N;2k is a constant equal to about 9 x 10 Nm /C ; q is the charge of each particle in C; and r is the distance between charges in m 2 Review: force is a vector quantity measured in N, which equal kg*m/s Adding all x components of force yield F , and the xame applies in the y direction 2 2 The magnitude of F = sqrt (F + F ) x y The direction of F = tan (F /F ) y x
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