# Motion Along a Straight Line

1. Oct 10, 2015

### RyanH42

1. The problem statement, all variables and given/known data
Could you help me with this one?

"In a particle accelerator, an electron enters a region in which it accelerates uniformly in a straight line from a speed of $4.00x10^5$ m/s to a speed of $6.00x10^7$ m/s in a distance of 3.00 cm. For what time interval does the electron accelerate?''

2. Relevant equations
$x-x_0=1/2(v+v_0)t$

3. The attempt at a solution
$x-x_0=0.03m$, $(v+v_0)=604.10^5$ so $0.06m=604.10^5t$
t=0.06/604.10^5)
t=0.0000993377.10-5s = 9.9.10-10 s
the answer is 9.38ns whiich its 9.38.10-9 s
Where I am making wrong

2. Oct 10, 2015

### vela

Staff Emeritus
Your calculation looks fine to me. Perhaps there's a typo in the problem.

3. Oct 10, 2015

### RyanH42

maybe ??

4. Oct 11, 2015

### haruspex

The given answer corresponds to an acceleration up to 6x106 m/s.

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