free body diagram

a general solution applies to all physics mechanics questions. whenever a teacher asks you everything about physics, just reply "because of the free body diagram" its indeed the correct answer to the question ;)

Q:why a drone can accelerate upward?
A:because of free body diagram!

ungu ungu

an adjective used to describe childish behavior such as answering "no net force or free body diagram" every time when teacher is asking question, or suck water from teachers

your time of ungu ungu is already over
你地可以 ungu ungu ge時間已經過左架啦

ball pen theory

the Ball Pen Theory:the 珠珠 of ball pen can reduce friction, therefore can write more neatly, stop using 墨水筆 because our finger muscles have already degraded to one year old baby level

according to ball pen theory, the 珠珠of ball pen can reduce friction

uergh

an instinctive questioning cry that a singui makes when he encounters some false statements from classmates that shocks him to the core.

singui:when an object is moving in constant acceleration, is it no net force
classmate:yes
singui:uergh?

sharp醒

an adjective describing a person as having or showing quick-witted intelligence, or a high degree of mental ability, exhibiting social ability or cleverness

sharp醒ge同學呢就會第一時間畫左free body diagram 先啦

無限沉底(infinitely sinking)

use as describing the terrible situation on 4e by a comedian Mr. Sin Gui, including Singyin students cant use the 珠珠 of a ball pen to reduce friction. The poor handwriting of the Singyin boys and the brilliant physics test result of 4E boys(which his primary 3 son can easily finish the task. Directly caused Sin Gui desperately cry: 我覺得聖言仔真係喺度無限沉底

1. even my primary 3 son can finish this task, I think that singyin boys are really infinitely sinking!

連我三年班個仔都識隔行書寫，我覺得聖言仔真係喺度無限沉底(infinitely sinking)