Films are often divided into genres, which describe the typical subject matter -- what the film is about. This is distinct from film styles, which describes filmic conventions which can be applied to any genre. Of course, the more that genres are defined, the more likely that a filmmaker will try to combine, transcend and evade categories, so not every film can be neatly labeled.
... (Compare with graphic below.) Since this friction force is essential for the device's operation, the groove must not be lubricated. The acceleration of the gyroscope i ...