linguistic:paraphrasing
Q factor

In a clock, the pendulum must receive pushes from the clock's movement to keep it swinging, to replace the energy the pendulum loses to friction. These pushes, applied by a mechanism called the escapement, are the main source of disturbance to the pendulum's motion. The Q is equal to 2 π times the energy stored in the pendulum, divided by the energy lost to friction during each oscillation period, which is the same as the energy added by the escapement each period. It can be seen that the smaller the fraction of the pendulum's energy that is lost to friction, the less energy needs to be added, the less the disturbance from the escapement, the more 'independent' the pendulum is of the clock's mechanism, and the more constant its period is. The Q of a pendulum is given by: Q = M ω Γ {\displaystyle Q={\frac {M\omega }{\Gamma }}} where M is the mass of the bob, ω = 2 π / T is the pendulum's radian frequency of oscillation, and Γ is the frictional damping force on the pendulum per unit velocity.