A block of mass \( m \) is kept in an elevator which starts moving downward with an acceleration...

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A block of mass \( m \) is kept in an elevator which starts moving downward with an acceleration \( a_{0} \) as shown in figure. The block is observed by two observers \( \mathrm{A} \) and \( \mathrm{B} \) for a time interval \( \mathrm{t}_{0} \). According to the observer math xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemistrymi mathvariant=normalA/mi/math
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