Final answer:
The technique used to add realistic acceleration or deceleration at the end of tweens is called 'easing.' Easing functions like ease-in, ease-out, and ease-in-out are used to emulate natural movements.
Step-by-step explanation:
The technique that allows the addition of a more realistic type of acceleration or deceleration at the end of tweens is known as 'easing.' Easing functions specify the rate of change of a parameter over time. Objects in real life don’t just start and stop instantly, and the easing functions attempt to emulate this by creating acceleration or deceleration. Common easing functions include ease-in, ease-out, and ease-in-out, which describe the acceleration curve differently.
For instance, 'ease-in' starts slowly and accelerates towards the end, while 'ease-out' starts quickly and decelerates to a stop. You can see this in action in sports, where the centripetal acceleration of the end of a club or racquet slows down in a decelerating arc. Analyzing such motion in slow motion can help understand these principles better.