A book is lifted from the floor and is kept in an almirah. One person says that the potential en... VIDEO
A book is lifted from the floor and is kept in an almirah. One person says that the potential energy of the book is increased by \( 20 \mathrm{~J} \) and the other says it is increased by \( 30 \mathrm{~J} \). Is one of them necessarily wrong?https://bit.ly/YTAI_PWAP https://www.pw.live
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