Electric field and speed - find acceleration.

AI Thread Summary
A proton accelerates in a uniform electric field of 640 N/C, reaching a speed of 1.20 x 10^6 m/s. To find the acceleration, the mass of the proton is needed, which can be looked up. The force from the electric field is calculated using F = ma, allowing for the determination of acceleration and subsequent calculations for time, distance, and kinetic energy. The user initially struggled but realized the importance of knowing the proton's mass and charge to solve the problem. They successfully found the answers after this realization.
Mommy2KAR420
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Homework Statement


A proton accelerates from rest in a uniform electric field of 640N/C. At some later time, its speed is 1.20x10^6m/s.
a) Find the magnitude of the acceleration of the proton.
b) How long does it take the proton to reach this speed?
c) How far has it moved in that interval?
d) What is its kinetic energy at the later time?


Homework Equations





The Attempt at a Solution


I think I can figure this problem out after knowing how to get started. I was confused as to how to start without having the mass. Any help?
 
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You can look up the mass and charge of a proton.
Use F = ma.
Of course it is the electric field that causes the force, so put in the formula for that.
 
Thank you. I went outside for a break and had the revelation. I feel stupid now. I got the answer for each part now. I don't know why I wasn't thinking about looking up the charge and mass. Thanks again!
 
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