The metric or SI (Le SystÃ¨me International d'UnitÃ©s) system of units has many derived units from the seven base units. A derived unit would be a unit that is a combination of base units. Density would be an example where density = mass/volume or kg/m3. Many derived units have special names for the properties or measurements they represent. This table lists eighteen of these specialized units along with their basic unit factors.
Cadence (cycling) In cycling, cadence (or pedalling rate) is the number of revolutions of the crank per minute; this is the rate at which a cyclist is pedalling/turning the pedals. Cadence is directly proportional to wheel speed, but is a distinct measurement and changes with gearingâwhich determines the ratio of crank rpm to wheel rpm.
A few notes here: 1  Notice that this cadence is right in line with an optimal running cadence. 2  I believe it is hard to run off the bike at 90+ rpm if youâve been cycling for hours at 80rpm. 3  Youâre asking your legs to make a huge adjustment, in addition to the difficulty of transitioning from cycling to running.