To convert 72 km/h to m/s, you need to use the conversion factor of 1 km/h = 0.2778 m/s.
72 km/h * 0.2778 m/s = 20 m/s
So, 72 km/h is equal to 20 m/s.
To calculate the acceleration of the car in m/s², you can use the formula:
Acceleration = (Change in velocity) / (Time taken)
The change in velocity is the final velocity minus the initial velocity. Since the car starts from rest (0 km/h), the initial velocity is 0 km/h. The final velocity is 72 km/h, which we've already converted to 20 m/s.
Acceleration = (20 m/s - 0 m/s) / 12.0 s
Acceleration = 20 m/s / 12.0 s
Acceleration = 1.67 m/s² (rounded to two decimal places)
So, the acceleration of the car is 1.67 m/s².
To determine the position of the car when it reaches the velocity of 72 km/h, you need additional information. Specifically, you would need to know the initial position of the car or additional information about its motion, such as whether it started from rest or if it was already in motion. Without this information, it's not possible to calculate the position at a specific time.