Another car travelling at 27m/s, decelerates at a=5m/s2 for a deceleration lasting t=20s, what would be the final speed now? Explain why a braking car cannot perform this feat. This is your first example of Formulas that do not have brains. You do! Are there other vehicles that can perform this manoeuver?

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system