(a(i))[2]
On Fig. 7.1, sketch the particle's path while it is between the plates and after it leaves them.
(a(ii)(1))[1]
For the particle in the region between the plates, state an expression, in terms of $E$, $m$, $q$, $v$ and $L$, as appropriate, for the force $F$ on the particle.
(a(ii)(2))[1]
For the particle in the region between the plates, state an expression, in terms of $E$, $m$, $q$, $v$ and $L$, as appropriate, for the time $t$ for the particle to cross the region between the plates.
(b(i))[2]
State the law of conservation of linear momentum.
(b(ii))[1]
Use your answers in (a)(ii) to state an expression for the change in momentum of the particle.
(b(iii))[2]
Suggest and explain whether the law of conservation of linear momentum applies to the particle moving between the plates.