If a car starts from rest and has a constant acceleration of 10 m/s², we can determine its velocity after the first two seconds using the following kinematic equation:
v = u + at
where: v = final velocity u = initial velocity (which is zero in this case, as the car starts from rest) a = acceleration t = time (2 seconds)
Substituting the given values into the equation:
v = 0 + (10 m/s²)(2 s)
Calculating the expression:
v = 0 + 20 m/s v = 20 m/s
Therefore, the car's velocity after the first two seconds is 20 m/s.