Question

define rate of change of velocity​

Answer 1

Answer: here is your answer :)

Explanation:  The rate of change of displacement of an object (displacement over elapsed time) is velocity. ... Acceleration: The rate of change of velocity is acceleration. Like velocity, acceleration is a vector and has both magnitude and direction.

Answer 2

$\huge\mathfrak\green{answer!}$

ᴛʜᴇ ʀᴀᴛᴇ ᴏғ ᴄʜᴀɴɢᴇ ᴏғ ᴠᴇʟᴏᴄɪᴛʏ ɪs ᴄᴀʟʟᴇᴅ ᴀᴄᴄᴇʟᴇʀᴀᴛɪᴏɴ.

ɪᴛ ɪs ᴍᴇᴀsᴜʀᴇᴅ ɪɴ = m/s²