Question

what is acceleration​

Answer 1

Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.

Answer 2

Answer:

ᴀᴄᴄᴇʟᴇʀᴀᴛɪᴏɴ ɪs ᴛʜᴇ ʀᴀᴛᴇ ᴏғ ᴄʜᴀɴɢᴇ ᴏғ ᴠᴇʟᴏᴄɪᴛʏ. ᴜsᴜᴀʟʟʏ, ᴀᴄᴄᴇʟᴇʀᴀᴛɪᴏɴ ᴍᴇᴀɴs ᴛʜᴇ sᴘᴇᴇᴅ ɪs ᴄʜᴀɴɢɪɴɢ, ʙᴜᴛ ɴᴏᴛ ᴀʟᴡᴀʏs. ᴡʜᴇɴ ᴀɴ ᴏʙᴊᴇᴄᴛ ᴍᴏᴠᴇs ɪɴ ᴀ ᴄɪʀᴄᴜʟᴀʀ ᴘᴀᴛʜ ᴀᴛ ᴀ ᴄᴏɴsᴛᴀɴᴛ sᴘᴇᴇᴅ, ɪᴛ ɪs sᴛɪʟʟ ᴀᴄᴄᴇʟᴇʀᴀᴛɪɴɢ, ʙᴇᴄᴀᴜsᴇ ᴛʜᴇ ᴅɪʀᴇᴄᴛɪᴏɴ ᴏғ ɪᴛs ᴠᴇʟᴏᴄɪᴛʏ ɪs ᴄʜᴀɴɢɪɴɢ.