  An electron moving parallel to a uniform electric field increases its speed from 2.0 × 10^7 m/s to 4.0 × 10^7 m/s over a distance of 2.0 cm.What is the electric field strength? Express your answer with the appropriate units.

Question

An electron moving parallel to a uniform electric field increases its speed from 2.0 × 10^7 m/s to 4.0 × 10^7 m/s over a distance of 2.0 cm.

What is the electric field strength?

Express your answer with the appropriate units.
Step 1

Write the expression of velocity as a function of position. help_outlineImage Transcriptionclose+ (4.0x10 m/s)(2.0x10' m/s) +2a(2.0 cm) (4.0x10 m/s)(2.0x10' m/s+2a(2.0 cm) = 1m 100 cm (4.0x10 m/s)-(2.0x10' m/s) 2a(2.0x 10 m a = a 3x1016 m/s fullscreen
Step 2

The formula for the electric force due to the electric field on the electron is:

Step 3

From Newton’s seco...

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Electric Charges and Fields 