hw4key

hw4key - 1 Step 1, formulas or related concepts.] Step 2,...

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Unformatted text preview: 1 Step 1, formulas or related concepts.] Step 2, known quantities. Step 3, direct application of the formulas/concept or the condition to form an equation. 1. Two infinitesimally small point charges of +2.0 μ C each are initially stationary and 5.0 m apart. (a) How much work is required to bring them to a stationary position 2.0 m apart? (b) 2.0 mm apart? (c) With a finite amount of energy, is it possible to push them together? HW4Key 1 1 B A e B A V V k q r r - =- ( ) 2 2 9 6 2 1 1 1 1 8.99 10 2 10 1.08 10 ( ) 2 5 e b a W q V k q J r r-- = Δ =- = × × × ×- = × a) b) c) it is impossible to push these two charges together ( ) 2 2 9 6 1 1 1 1 8.99 10 2 10 17.97( ) 0.002 5 e b a W q V k q J r r- = Δ =- = × × × ×- = ( ) 2 2 9 6 1 1 1 1 8.99 10 2 10 inf 5 e b a W q V k q r r- = Δ =- = × × × ×- = Step 4, vector involved?...
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This note was uploaded on 05/06/2008 for the course PHYS 1304 taught by Professor Ye during the Spring '08 term at SMU.

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hw4key - 1 Step 1, formulas or related concepts.] Step 2,...

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