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.
You've already chosen the best response. It's a vector because acceleration has both a direction and a magnitude. An example would be a car stopping at a rate of 10 m/s. In this example the direction of acceleration is opposite the direction of velocity (towards the trunk) and the magnitude is 10 m/s.Show full answer.ou've already chosen the best response. It's a vector because acceleration has both a direction and a magnitude. An example would be a car stopping at a rate of 10 m/s. In this example the direction of acceleration is opposite the direction of velocity (towards the trunk) and the magnitude is 10 m/s.