Answer
1.6 meters/second
Work Step by Step
Given:
Acceleration of Electron = $+3.2 m/s^{2}$
Velocity at a certain instant = $+9.6 m/s$
Time at certain instant = $0$ seconds
$2.5$ seconds earlier than certain instant = $0- 2.5 seconds = -2.5$ seconds
Need to Know:
The velocity $2.5s$ earlier than the certain instant = ?
We use the equation:
$V= Vo + at$
$V= 9.6m/s + (3.2m/s2)(-2.5s) = 1.6m/s$
