# HW2 - Platt, David – Homework 2 – Due: Sep 9 2005, 4:00...

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Unformatted text preview: Platt, David – Homework 2 – Due: Sep 9 2005, 4:00 am – Inst: Ken Shih 1 This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 2) 10 points Four charges- 2 × 10- 9 C at (0 m,0 m),- 1 × 10- 9 C at (- 4 m,- 1 m), 2 × 10- 9 C at (- 3 m,2 m), and 5 × 10- 9 C at (4 m,3 m), are arranged in the ( x,y ) plane (as shown in the figure below, where the scale is in meters). y ( m )- 5- 3- 1 1 2 3 4 5 x ( m )- 5- 4- 3- 2- 1 1 2 3 4 5- 2 nC- 1 nC 2 nC 5 nC Find the magnitude of the resulting force on the- 2 nC charge at the origin [coordinates, (0 m , 0 m)]. Answer in units of N. 002 (part 2 of 2) 10 points Select the figure showing the direction of the resultant force on the- 2 nC charge at the origin. 1. y θ = 150 . 564 ◦- 5- 3- 10 1 2 3 4 5 x- 5- 4- 3- 2- 1 1 2 3 4 5 2. y θ = 280 . 523 ◦- 5- 3- 10 1 2 3 4 5 x- 5- 4- 3- 2- 1 1 2 3 4 5 3. y θ = 49 . 5175 ◦- 5- 3- 10 1 2 3 4 5 x- 5- 4- 3- 2- 1 1 2 3 4 5 4. y θ = 17 . 602 ◦- 5- 3- 10 1 2 3 4 5 x- 5- 4- 3- 2- 1 1 2 3 4 5 5. None of these figures is correct. 6. y θ = 266 . 282 ◦- 5- 3- 10 1 2 3 4 5 x- 5- 4- 3- 2- 1 1 2 3 4 5 7. y θ = 128 . 45 ◦- 5- 3- 10 1 2 3 4 5 x- 5- 4- 3- 2- 1 1 2 3 4 5 Platt, David – Homework 2 – Due: Sep 9 2005, 4:00 am – Inst: Ken Shih 2 8....
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## This note was uploaded on 04/10/2009 for the course PHY 303L taught by Professor Turner during the Fall '08 term at University of Texas.

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HW2 - Platt, David – Homework 2 – Due: Sep 9 2005, 4:00...

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