What if there is no nail clipper in the hotel?

You can use scissors. See how skilled she is with scissors when cutting her nails. She is not used to using nail clippers for her. When asked why she chose scissors to trim her nails, she said that when she was young, there were no nail clippers at that time. Everyone trims their nails with scissors. After cutting for decades, she didn't feel any inconvenience.

principle of operation

Nail clippers consist of three metal plates. For the sake of explanation, we will call the lower one with blades 1, the upper one 2, and the one that can rotate freely 3. I named it temporarily, so don't stick to it. )

The nail clipper has two levers. Thumb pressing the 3rd piece is a labor-saving lever, with the small shaft as the fulcrum, the place where the thumb is pressed as the stress point, and the contact point between the 3rd piece and the 2nd piece as the center of gravity. In this way, the length of the whole No.3 blade is the force arm, and the distance from the small shaft to the contact point of No.2 and No.3 blade is the gravity arm, because the force arm is much larger than the specific force arm, so it is a labor-saving lever.