Nanchang gear recruitment

According to the angular velocity ω=2πn, ω = 2π nt; The pedal is coaxial with the toothed plate, so the angular velocity is equal, and the flywheel and the toothed plate are linked by a chain, so the linear velocity is equal;

Let the angular velocity of the flywheel be ω', the number of teeth of the measuring toothed plate be m, and the number of teeth of the flywheel be n,

Then Ω' Ω = Mn, and then measure the radius r of the rear wheel of the bicycle, according to v = Ω'

Get: v = mnr ω = 2π mrnnt

So the answer is: 2πnt；; 2πmRNnt