A satellite revolves around the Earth because of the force between them. Orbital velocity of a satellite of Earth is directly proportional to the square root of the mass of Earth and inversely proportional to the square root of the distance from the center of Earth to the satellite. In this activity, play with the speed of the satellite and mass of Earth to see what happens to the satellite. If the speed of the satellite is slower than the required orbital speed then the force applied by the Earth on the satellite is too much and thus the satellite gets pulled towards the Earth and burns in it's atmosphere. If the speed of the satellite is more than the required orbital speed then the Earth's force is not enough to keep it in orbit and thus the satellite flies away due to it's own inertia.
Cuairtichidh saideal an Talamh air sàilleibh na cumhachd eatorra. Tha luaths reul-chuairt an t-saideil a rèir tomad ceàrnagach na Talmhainn is co-rèireach mùiteach ris an astar cheàrnagach eadar meadhanan na Talamhainn is an saideal. Sa chleas seo, cluich le luaths an t-saideil is tomad na Talmhainn gus faicinn na thachras leis an t-saideil. Ma tha an saideal nas slaodaiche na an luaths a tha a dhìth ach an tèid e air reul-chuairt, bidh cumhachd tomad na Talmhainn air an t-saideal ro mhòr is thèid an saideal ga tharraing an comhair na Talmhainn is a losgadh san àile. Ma tha an saideal nas luaithe na tha a dhìth gus dol air reul-chuairt, chan eil cumhachd gu leòr aig an Talamh gus a chumail sa reul-chuairt aige is teichidh an saideal air sàilleibh na tàmhachd aige fhèin.