push — (verb) to press something away from you · pull — (verb) to move something towards you · gravity — (noun) the force that pulls things down to the ground · heavy — (adjective) weighing a lot · light — (adjective) weighing very little · fast — (adjective) moving at high speed

weight — (noun) how strongly gravity pulls on an object · mass — (noun) the amount of matter in something · motion — (noun) the act of moving or being moved · speed — (noun) how fast something moves · velocity — (noun) the speed of something in a certain direction · acceleration — (noun) how quickly something speeds up

energy — (noun) the ability to do work or cause change · potential — (adjective) stored energy or possible movement · kinetic — (adjective) related to moving energy · pressure — (noun) force applied to an area · aerodynamics — (noun) the study of how air moves around things · tension — (noun) a force that stretches something