Tuesday
March 31, 2015

Homework Help: physics

Posted by Chris on Friday, September 2, 2005 at 10:08pm.

electrons are accelerated from rest over a distance of 800m to a velocity of 3x10 7 m/s. what is the acceleration of the electrons and what formula did you use to find the acceleration.


(1/2)[V(final)^2 - V(initial)^2] = a X
V(final) = sqrt (2 a X)
a = [V(final)^2/(2 X)]
=5.63*10^11 m/s^2


thank you, I was trying to start with finding the time first and couldn't figure it out. I tried changing the average velocity formula to come up with t. t=change in displacement / velocity, but wasn't sure if that was a proper way to change the formula, definitely didn't come up with the same answer. thanks.


Your method should have also worked. The distance covered is Vaverage = Vfinal/2 = a T/2.
Vaverage* T = X
Now eliminate T
Vaverage = (a/2)*(X/Vaverage)
Vaverage^2 = (a/2) X
Vfinal^2 = 2 a X

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - Electrons are accelerated to reach a kinetic energy of 250 eV (= 4.0 x...
Physics - A motorcycle with a mass of 350 kg is accelerated from rest to a ...
Physics - In a television tube, electrons initially at rest are accelerated by a...
physics - The electrons in a TV tube are accelerated from rest through a ...
Acceleration physics - 1. A sprinter finishes the race with a velocity of 8.9 m/...
Physics - Starting from rest, Mr.M's bus achieves a velocity of 25 m/s in a ...
science - An electron had a constant acceleration of +3.2m/s^2. At a certain ...
physics - In a synchrotron, electrons are accelerated to speeds close to the ...
Physics - In a cathode ray tube, electrons initially at rest are accelerated by ...
Physics - In a cathode ray tube, electrons initially at rest are accelerated by ...

Members