Which of the following does not demonstrate friction at work?

P	Ice tongs holding a block of ice.
Q	A hand holding a piece of paper.
R	A man slipping on a wet floor.
S	A ball rolling.

Look at the diagram below. The box does not move because _____.

The following diagram shows a man pushing a table.

Now, the man is applying ______ on the table.

If a person is able to move the table through a distance, then _____ is said to be done.