ancillae. 1  nominative plural of. 2  genitive singular of. 3  dative singular of.  vocative plural of.
Acceleration is the time rate of change of velocity. If velocity is constant, then. acceleration is zero. Note: 100 km per h for 10 seconds is a constant speed, but not necessarily a constant. velocity, since we're told nothing about the direction.
Best Answer: The 3rd answer is the correct one. Since the velocity is constant, there is no change in velocity, thus zero acceleration. To actually say that there are no forces acted on the car is wrong assumption. the force direction to the left (thrust) is there but it has been eliminated by the force acted to the right (friction). Thus, the net force equal to zero. Based on F=Ma, there will be no acceleration, in other word, no change in velocity, constant velocity. If they were not, Newton's second law (F = ma) would apply and the car would accelerate changing the velocity. so 3 is correct.