To find the initial velocity of the car, we can use the kinematic equation that relates the final velocity (v), initial velocity (u), acceleration (a), and time (t):
v = u + at
Given: Acceleration (a) = 8 m/s² Final velocity (v) = 40 m/s Time (t) = 5 seconds
Plugging these values into the equation, we can solve for the initial velocity (u):
40 = u + (8)(5)
40 = u + 40
Subtracting 40 from both sides, we get:
u = 0
Therefore, the initial velocity of the car is 0 m/s. This indicates that the car was initially at rest before it started accelerating.