運動定律

运 = 云 + 辶 : Yu the Great (yu) is practicing step dancing in the encampment's bathroom ((e)n4). She is wearing gladiator sandals (辶) and is moving (运) so fast that she's evaporating the floor. There are even clouds (云) of smoke coming from her gladiator sandals and the evaporated floor.

动 = 云 + 力 : Doggy Dog notices a lot of smoke when he enters engine's bathroom. Instead of thinking long, he acts quickly and moves to push the fire alarm button.

定 = 宀 + 下 + 人 : "to fix": duct tape. Somebody wanted to tease Dorothy Gale and taped a graduation cap to her head. Neanderthal Man tries to help her by levering the cap off with a ladder in the engine's bathroom.

律 = 彳 + 聿 : Loki (lü) wants to prove the inverse square law (律) of electrostatics in the space station's bathroom (Ø4). He repeatedly rubs a decorator's brush (聿) against the soles of his black sneakers (彳) and thereby transfers electrons from the shoe soles to the brush. Now that both are charged, they will attract each other according to the inverse square law (律). To measure the amplitude, Loki uses Hook's law (律): when the black sneaker is attracted to the brush it will bend the bristles of the brush until the two forces cancel each out.