14. [-/10 Points] DETAILS SERPSE10 22.6.OP.019. MY NOTES ASK YOUR TEACHER A proton is projected in the positive x direction into a region of uniform electric field E = (-7.00 x 105) i N/C att = 0. The proton travels 7.60 cm as it comes to rest. (a) Determine the acceleration of the proton. magnitude m/s2 direction -Soloct- (b) Determine the initial speed of the proton. magnitude m/s direction -Select-- 0 (c) Determine the time interval over which the proton comes to rest. Need Help? Read It Watch It