(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

An electron in a cathode ray tube of a TV set enters a region where it accelerates

uniformly from a speed of 3.5 × 104 m/s to a speed of 1.4 × 106 m/s in a distance

of 2.0 cm. (a) What is the acceleration of the electron in this region? (b) How

long is the electron in the region where it accelerates?

2. Relevant equations

3. The attempt at a solution

A) Vi= 3.5 x 104 m/s Vf= 1.4x 10^{6 }m/s

d= 0.02 m

Vf^{2}= Vi^{2}+ 2ad

(1.4x10^6)^{2}= (3.5x 10^4)^{2}+ 2a(0.02)

(1.958775 x 10^12) = 2a(0.02)

(1.958775x10^12) = 0.04a

0.04 0.04

4.8969375x 10^{13}= a

*******************************************

b) Vf= Vi+ at

(1.4x10^6)= (3.5x10^4)+ ( 4.8969375x10^13)t

136500 = 4.8969375x10^13t

4.8969375x10^13t 4.8969375x10^13t

= 0.000000003 -->t = 3.0x 10^-9

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Acceleration Question.Please Check My Answer

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