Which of the following is not an example of work done?

مندرجہ ذیل میں سے کون سا کام کی مثال نہیں ہے؟

Raise the book to some height and walking

A man pushing against the wall

Trolley moves when the boy pushes the trolley

Applied force on an object in that direction the object is moving

Work is done when a force causes displacement of an object in the direction of the force.

A man pushing against the wall, although force is applied, the wall does not move, so no displacement occurs → no work is done.