A man pushes the wall and fails to displace it. He does
A man pushes the wall and fails to displace it. He does
negative work
positive but not maximum work
no work at all
maximum work
Solution
When man pushes the wall, then he does not produce any displacement in the wall.
\(\begin{aligned}
& \text {i.e., displacement }=0 \\
\therefore \quad \text { Work done } & =\text { Force } \times \text { Displacement } \\
& =\text { Force } \times 0=0
\end{aligned}\)