physics

An electron has an initial speed of
2.95 × 105 m/s.If it undergoes an acceleration of 2.7 × 1014 m/s^2, how long will it take to reach a speed of 5.94 × 105 m/s?

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asked by linda
  1. luckily 6*10^5 is much less than light speed of 3*10^8 so not a relativity problem

    v = Vi + a t
    5.94 * 10^5 = 2.95*10^5 + 2.7*10^14 t
    divide by 10^5

    5.94 = 2.95 + 2.7*10^9 t

    2.7 * 10^9 t = 2.99

    t = 1.107 * 10^-9 seconds

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    posted by Damon
  2. What about how far it has traveled in the time

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    posted by Alex

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