Final answer:
The average acceleration of Spongebob's mousetrap car is -100 m/s².
Step-by-step explanation:
The average acceleration of Spongebob's mousetrap car can be calculated using the equation a = F/m, where a is the acceleration, F is the net force, and m is the mass of the car. In this case, Spongebob's car has a mass of 0.1 kg and an overall force of -10 N. Plugging these values into the equation, we get:
a = -10 N / 0.1 kg = -100 m/s²
So the average acceleration of Spongebob's car is -100 m/s².