Question

who provided that gravitational mass of a body is equal inertial mass​

Answer 1

$\huge\underline{\overline{\mid{\bold{\pink{ANSWER-}}\mid}}}$

Albert Einstein

The equivalence principle was properly introduced by Albert Einstein in 1907, when he observed that the acceleration of bodies towards the center of the Earth at a rate of 1g (g = 9.81 m/s2 being a standard reference of gravitational acceleration at the Earth's surface) is equivalent to the acceleration of an

$\huge\underline\mathcal \red{ᴍɪss ᴘʜᴇɴᴏᴍᴇɴᴀʟ}$

Answer 2

$\huge\pink{Answer}$

ᴛʜᴇ ʀᴀᴛɪᴏ ᴏғ ᴛʜᴇ ɪɴᴇʀᴛɪᴀʟ ᴍᴀss ᴛᴏ ɢʀᴀᴠɪᴛᴀᴛɪᴏɴᴀʟ ᴍᴀss ɪs ᴇǫᴜᴀʟ ᴛᴏ: ... ʙᴜᴛ ᴛʜᴇ ɢʀᴀᴠɪᴛᴀᴛɪᴏɴᴀʟ ᴍᴀss sʜᴏᴡs ᴛʜᴇ ᴀʙɪʟɪᴛʏ ᴏғ ᴛʜᴇ ʙᴏᴅʏ ᴛᴏ ...