Question

What is meant by a reference point?​

Answer 1

ᴀ ʀᴇғᴇʀᴇɴᴄᴇ ᴘᴏɪɴᴛ ɪs ᴀ ᴘʟᴀᴄᴇ ᴏʀ ᴏʙᴊᴇᴄᴛ ᴜsᴇᴅ ғᴏʀ ᴄᴏᴍᴘᴀʀɪsᴏɴ ᴛᴏ ᴅᴇᴛᴇʀᴍɪɴᴇ ɪғ sᴏᴍᴇᴛʜɪɴɢ ɪs ɪɴ ᴍᴏᴛɪᴏɴ. ᴀɴ ᴏʙᴊᴇᴄᴛ ɪs ɪɴ ᴍᴏᴛɪᴏɴ ɪғ ɪᴛ ᴄʜᴀɴɢᴇs ᴘᴏsɪᴛɪᴏɴ ʀᴇʟᴀᴛɪᴠᴇ ᴛᴏ ᴀ ʀᴇғᴇʀᴇɴᴄᴇ ᴘᴏɪɴᴛ. ᴏʙᴊᴇᴄᴛs ᴛʜᴀᴛ ᴀʀᴇ ғɪxᴇᴅ ʀᴇʟᴀᴛɪᴠᴇ ᴛᴏ ᴇᴀʀᴛʜ – sᴜᴄʜ ᴀs ᴀ ʙᴜɪʟᴅɪɴɢ, ᴀ ᴛʀᴇᴇ, ᴏʀ ᴀ sɪɢɴ - ᴍᴀᴋᴇ ɢᴏᴏᴅ ʀᴇғᴇʀᴇɴᴄᴇ ᴘᴏɪɴᴛs.

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Answer 2

A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point. Objects that are fixed relative to Earth – such as a building, a tree, or a sign - make good reference points.

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