To find the final velocity of a car that starts from rest and accelerates at a rate of 20 m/s² for 10 seconds, we can use the kinematic equation:
v = u + at,
where: v = final velocity u = initial velocity (in this case, 0 m/s as the car starts from rest) a = acceleration (20 m/s²) t = time (10 seconds)
Substituting the values into the equation:
v = 0 + (20 m/s²)(10 s) v = 200 m/s.
Therefore, the final velocity of the car after 10 seconds of accelerating at a rate of 20 m/s² from rest will be 200 m/s.