In classical mechanics, the kinematic equations of motion, describe the motion of bodies but not the forces that causes the motion
The final speed of the car is 24 m/s
The distance covered by the during the acceleration is 72 meters
The reason the above values are correct are as follows:
The given parameters are;
The initial speed of the car, u = 12 m/s
The acceleration rate of gain of speed, a = 3 m/s²
The duration of the acceleration, t = 4 s
Calculated parameters:
The final speed of the car, v = u + a·t
∴ v = 12 m/s + 3 m/s² × 4 s = 24 m/s
The final speed of the car, v = 24 m/s
The distance covered during acceleration, s = u·t + (1/2)·a·t²
∴ s = 12 × 4 + (1/2) × 3 × 4² = 72
The distance covered by the during the acceleration, s = 72 meters
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