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.
The derivative of velocity with respect to time. #a=(dv)/dt#. Imagine your your driving a car. As you accelerate you observe the needle of your speedometer moving smoothly from 0 to 60 miles an hour. What is your acceleration? By definition your acceleration is the rate of change in in your velocity within a particular amount of time. If we take the limit at which the difference in time between #t2# and #t1# or #trianglet# approaches zero we can find the time derivative of the the velocity which is the instantaneous acceleration.