The force needed to accelerate an object is given by the formula:
Force = Mass x Acceleration
Here, the mass of the car is 768 kg and the acceleration is 7 meters per second squared (7 m/s^2).
So, the force needed to accelerate the car is:
Force = 768 kg x 7 m/s^2
Force = 5376 Newtons (rounded to the nearest whole number)
Therefore, a force of approximately 5376 Newtons is needed to accelerate a 768 kilogram car at a rate of 7 meters per second per second.