Planetary Motion
Roll a steel ball along the periphery of the exhibit and observe its motion. The ball moves faster when it comes closer to the Centre. Had there been no air or rolling friction, the ball would have continued in orbit forever. The steel ball represents a satellite orbiting round the earth. The satellite moves faster when it comes closer to the earth. The gravity well is a mechanical likeness of earth’s gravitational fields. When a satellite is in a low orbit closer to the earth, it experience air friction and eventually falls on the earth. Roll two or three balls of varying sized successively to put them in a different orbit and observe their motion.
Wing
Category
Pyn tyllun ia ka bolisbad (steel) narud jong kane ka jingshna bad peitkumno ka ïaid. Ka bol ka ïaid kham stet ynda jan poi hapdeng. Lada ym don lyer ne ‘rolling friction’ kane ka bol kan shu tyllun sah. Kane ka bolis bad ka long kum u ‘satellite’ ba tawiar ia ka pyrthei. Katba dang jan ia ka pyrthei u satellite u ïaid kham stet. Kane ka thliew ka khring ka long thik kum ka bor kaba tan shaphang pdeng pyrthei ne ka ‘gravitational field ‘jong ka pyrthei. Ynda u satellite u sdang jan sha ka pyrthei, ka jing don jong ka ‘air friction’ ha lyer ka pyn man ia u ban hap noh sha sla pyrthei.
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