Now we know what to do: extend the time over which we bring the keys to rest and we will reduce the average (and peak) force applied to the keys. By Newton's Third Law, we know that the force on the k...Now we know what to do: extend the time over which we bring the keys to rest and we will reduce the average (and peak) force applied to the keys. By Newton's Third Law, we know that the force on the keys is equal and opposite to the force on our hands, so analyzing the force on the keys tells us about the force on our hand.
