A uniform electric field exists in the region between two oppositely charged parallel plates 1.50 cm apart. A proton is released from rest at the surface of the positively charged plate and strikes the surface of the opposite plate in a time interval 1.41×10-6 s .
A. Find the magnitude of the electric field. ( in N/C)
Use 1.60×10-19 C for the magnitude of the charge on an electron and 1.67×10-27 kg for the mass of a proton.
B. Find the speed of the proton at the moment it strikes the negatively charged plate. (in m/s)