Question

how value of g varies with altitude and depth​

Answer 1

Variation of g(acceleration of gravity) with altitude, depth and latitude. Consider an object of mass m at a height h from the surface of the Earth. ... This means that as altitude h increases the acceleration due to gravity g decreases.

Answer 2

ᴀᴄᴄᴇʀʟᴀᴛɪᴏɴ ᴏɢ ɢʀᴀᴠɪᴛʏ ᴡɪᴛʜ ᴀᴘᴛɪᴛᴜᴅᴇ , ᴅᴇᴘᴛʜ ᴀɴᴅ ʟᴀᴛɪᴛᴜᴅᴇ. ᴛʜɪs ᴍᴇᴀɴs ᴛʜᴀᴛ ᴛʜᴇ ᴀʟᴛɪᴛᴜᴅᴇ ʜ ɪɴᴄʀᴇsᴇsᴇs ᴛʜᴇ ᴀᴄᴄᴇʀʟᴀᴛɪᴏɴ.