(This is a quantitative version of the previous problem, but including angle considerations.) An electron and a proton are both in motion near each other as shown in Figure 21.84; at this instant they...

(This is a quantitative version of the previous problem, but including angle considerations.) An electron and a proton are both in motion near each other as shown in Figure 21.84; at this instant they are a distance r apart. The proton is moving with speed vp at an angle θ to the horizontal, and the electron is moving straight up with speed ve.