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.
Answer is NO. If I am walking along a road as I normally do at a constant velocity of 2.5m/s. my velocity is constant, but not zero, and my acceleration is zero. Like wise if I drive my car as I usually do along the highway at a constant velocity of 15m/s, My acceleration is zero. But my velocity is not zero. The converse: In free flight, the acceleration of any object is always 9.81m/sÂ² downwards. It never changes. If I throw a ball up into the air at its highest altitude, as it changes from going up to coming down, the velocity is zero, but the acceleration downwards due to gravity is still as it always is , 9.81m/sÂ³.