5 A man of mass 75 kg is standing in a lift. He is holding a parcel of mass 5 kg by means of a light inextensible string, as shown in Fig. 5. The tension in the string is 55 N .
\begin{figure}[h]
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\caption{Fig. 5}
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- Find the upward acceleration.
- Find the reaction on the man of the lift floor.