Because humans have five senses: feel, see, taste, hear, and smell. When you step on a nail you basically going to feel it and you brain can sense that and it can trigger nerves which can cause pain.
While velocity is your speed, or how fast you are moving, acceleration refers to how your velocity is changing. For example, a negative acceleration means you are slowing down
Hope this helps
Talk about the deceased person. Listen to what they have to say. Connect with them on a mutual level
