Respuesta :

MOHAMMAD848

Answer:

When oil, grease or graphite is applied

between the moving part of a machine,

a thin layer is formed there and moving

surfaces do not directly rub against each

other (Fig. 12.13). Interlocking of

irregularities is avoided to a great extent.

Movement becomes smooth. The

substances which reduce friction are

called lubricants.

Oseni

Lubricating the wheels of a skateboard can increase the speed of a skateboarder because the magnitude of the force limiting the motion of the wheels will have been reduced by the lubricants.

The moving parts (the wheels) of a skateboard are limited by frictional forces. These forces limit the maximum speed that can be reached by a skateboarder.

Lubricating the moving parts will reduce the frictional forces and thus, increase the maximum speed that can be reached.

More on frictional forces can be found here: https://brainly.com/question/1714663