What is the difference between slips trips and falls?

Answer 1

slip: the surface is wet or shiny and an object (or foot) cannot retain traction and goes forward in an uncontrolled manner.
trip: an obstacle usually not seen and at a low height causes the person to lose balance.
fall: both of the above will probably result in a fall. The person will go involuntarily from an upright stance to the ground, usually quite suddenly.

Answer 2

Slips on a patch of spilt liquid or a banana skin.

Trips on a bad surface such as a raised edge of a paving stone.

Fall from height may cause injury or death, such as falling from a ladder, or falling while scaling a rock-face.