When you flick a coin so that it slides across a table, what four forces are acting on the coin?

Pushing force

friction

gravity

normal force

Any time the coin is on the table:

- - gravity acting downwards

- - normal force of the table, acting upwards

Any time the coin is moving:

- - friction force, on the coin's underside

- - air resistance

Both of these act opposite to the direction of the coin's motion.

During the flick, while your finger is still touching the coin:

- - the flicking force, a push exerted by your finger

The force ends as soon as the coin leaves contact with your finger.