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Answer :
When a force F acts on an object to move it in its direction through a distance S, the work is done
We know that, \( Work \ done \ = \ Force \ × \ Displacement \)
\( \Rightarrow W = F × S \)
\(\Rightarrow W = 7 × 8 \)
\(\Rightarrow \) W = 56 Nm
\(\therefore \) W = 56 J