I decided to explain how these snow treads maximise friction on this tractor. The treads add friction by creating more resistance on a smooth surface such as snow or ice. Because the snow treads grip to the snow, there is more friction therefore the tractor doesn't slip and slide about. The treads are like a conveyor belt, so when the wheels move the treads move with them.
ReplyDeleteAnd to think all this extra friction got Sir Edmund Hillary to the South Pole. Thanks Isabelle (one of my favourite artefacts at MOTAT)