When the king came of age, the mayor exerted himself to keep this power, and succeeded.
With flat roofs the pressure exerted upon the supports is directly vertical.
The restoring force exerted by gravity acts in a vertical line from the centre of gravity; and the length of its lever arm is the horizontal distance between this vertical line and the outer rail.
Coulomb, who by using very long and thin magnets, so arranged that the action of their distant poles was negligible, succeeded in establishing the law, which has since been confirmed by more accurate methods, that the force of attraction or repulsion exerted between two magnetic poles varies inversely as the square of the distance between them.
He served in the New York legislature (1759-1760), but his political influence was long exerted chiefly through pamphlets and newspaper articles.