Why people raise their hand when they knock a door?

1.47K viewsOtherPhysics

Because you can knock a door with your hand down as well and it would be more convenient?

In: Physics

33 Answers

Anonymous 0 Comments

When you extend your arm, you knock with your arm.

When you keep the arm close to your body, you knock using your wrist.

Forearm is weak and not comfortable for most people so we raise the arm to make room and knock with triceps.

You are viewing 1 out of 33 answers, click here to view all answers.