Upvote:2
A medieval knight in armor on a horse (with stirrups) was easily the equal of five to ten "peasants with pitchforks."
That's because riding a horse would give the rider a momentum that was a multiple (three, four, five) times that of someone on foot. Basically a knight could "ride down" one peasant, turn around the horse, and repeat the process several times. If there were enough peasants, the horse would run out of wind" before they did, but the required number of peasants was probably closer to ten than to five. As for peasants grabbing the knight's legs or arms, forget about it, if he's on a horse. The peasant who did that would be "dragged" to his death.
Even a knight in armor without a horse, but with a spear or lance was worth several peasants with spears but no armor. The knight could initially kill one or two peasants with little or no damage to himself. Even if they "overran" him, it would take much longer for a peasant to strike a fatal blow against an armored knight, than for the knight to kill an unarmored peasant. The knight could kill "several" before they finally overwhelmed him.