Electric Fields and Kinetic Energy of protons

AI Thread Summary
To determine the electric field required to stop protons with a kinetic energy of 3.25 x 10^-15 J over a distance of 1.25 m, the work done by the electric force must equal the change in kinetic energy. The initial kinetic energy is provided, while the final kinetic energy is zero since the protons come to a stop. The relationship between force, electric field, and charge is utilized, where the electric field is calculated as the force divided by the charge of the protons. The relevant equations involve the concepts of work, kinetic energy, and electric force. The solution involves calculating the necessary electric field magnitude and direction to achieve this stopping distance.
hirschy
Messages
7
Reaction score
0

Homework Statement



Each of the protons in a particle beam has a kinetic energy of 3.25 x 10^-15 J. What are the magnitude and direction of the electric field that will stop these protons in a distance of 1.25 m?


Homework Equations



Felectric = kC (q*q/r^2)
Electric Field= Felectric/q
Electric Field= kC (q/r^2)
Velocityfinal= velocityInitial + a*t
Velocityfinal^2 = VelocityInitial^2 + 2a(d)



The Attempt at a Solution



I need help with this.
 
Physics news on Phys.org
Work done by the electric force = change in the KE.
Initial KE is given. Final KE = ...?
Work done by the electric force F = ...?
And as you have stated E = f/q.
Now try.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Dependence of an electric field on distance
Replies
12
Views
2K
The time for a proton to reach a certain velocity
Replies
4
Views
2K
Find the electric field between 2 finite discs
Replies
16
Views
1K
What Was the Initial Speed of the Proton in a Collision?
Replies
2
Views
3K
Electric Field Force Exerted Vertically
Replies
9
Views
8K
Electric field of point along the central vertical axis of a triangle
Replies
3
Views
866
Calculating eletric potential using line integral of electric field
Replies
1
Views
2K
Lorentz force and induced electric field
Replies
6
Views
1K
Making sense of sequence of ideas in MIT OCW's 8.02 notes on Faraday
Replies
1
Views
1K
Conceptual Issue RE: electric potential difference
Replies
1
Views
1K

Hot Threads

Recent Insights

Back
Top