Paul is driving his car and he changes his velocity from 5 m/s to 15 m/s in 2 seconds. Is this an example of positive acceleration or negative acceleration?

[34 points awarded to the best answer, use facts and/or data] 1.) what's the likelihood of thunderstorms occurring in the state of maryland? {this question is for a project for science, use facts and/or data and explain why . 34 points to the best answer]