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.
Acceleration. Acceleration is the rate at which velocity (speed) is changing. If an object is moving with a constant velocity, then its acceleration is zero, since the velocity never changes. But imagine a car going along at 30 mph (miles per hour).When we check the speed one second later, we find the speed is now 32 mph. So in that one second, the speed increased by 2 mph.ut imagine a car going along at 30 mph (miles per hour). When we check the speed one second later, we find the speed is now 32 mph. So in that one second, the speed increased by 2 mph.