Thank you for the opportunity to help you with your question!

Thank you for the opportunity to help you with your question!

net force = 2100N-1800N=300N

a. acceleration = F/m = 300N/1200kg = 0.25 m/s^2

b. speed = a*t=0.25m/s^2 * 10s = 2.5 m/s Please let me know if you need any clarification. I'm always happy to answer your questions.Please let me know if you need any clarification. I'm always happy to answer your questions.

I'm kinda confused with this question, and I don't know where to start.

A car is traveling at 20m/s on a flat highway. If the coefficient of friction on a rainy day is 0.1, what is the minimum distance needed for the car to stop?