Physics 12: Acceleration of Proton in B-Field

[marysaf]

Homework Statement

[/B]
A proton is accelerated from rest at the positive plate of two charged parallel plates with a potential difference of 2000 v. After leaving the plates through a small hole in the negative plate, it enters a uniform magnetic field of 0.50 T in a direction perpendicular to the magnetic field directed out the page as shown in the diagram. Find the acceleration of the proton.

https://drive.google.com/file/d/0B_FmHNxGrZAcN21ic0kwQ191alpram5qc0loclFhRFZTN3Yw/view?usp=sharing

Homework Equations

a=v^2/2d

The Attempt at a Solution

I tried to use the equation above but I don't have d and don't know how to find it. should I use f=ma?

 

[haruspex]

should I use f=ma?

Yes.

 

[rude man]

Homework Statement

[/B]
A proton is accelerated from rest at the positive plate of two charged parallel plates with a potential difference of 2000 v. After leaving the plates through a small hole in the negative plate, it enters a uniform magnetic field of 0.50 T in a direction perpendicular to the magnetic field directed out the page as shown in the diagram. Find the acceleration of the proton.

https://drive.google.com/file/d/0B_FmHNxGrZAcN21ic0kwQ191alpram5qc0loclFhRFZTN3Yw/view?usp=sharing

https://lh6.googleusercontent.com/SWII9lhrczWbmznSniycfEcDFtVfg1orKhlr4ua9AmkZbKIVm5eUmqZWPcBqWt-2xArx66svycn4BCHaQm8nXaSDU10Jd3dVW85c=w878-h1043-rw

Homework Equations

a=v^2/2d

The Attempt at a Solution

I tried to use the equation above but I don't have d and don't know how to find it. should I use f=ma?

F = qvB also helps.

 

[Mariz]

There are two accelerations in this problem.
The linear one, between the plates.
To find this one you must find first the final velocity. Use energy to do that.

The centripetal one. In the magnetic field. Do find this use F=qvB sin(theta).