The City of Westminster is a London borough and a city in its own right, situated to the west of the City of London and north of the River Thames. It was extended in 1965 to include the former Metropolitan Boroughs of St. Marylebone and Paddington in the north. The city contains most of London's West End.
... around inside the groove, the friction between the axis and the groove rims will accelerate or brake the spinning gyroscope, with a maximum effect when the axis starts ...