![\"\"](\"https:\/\/blogs.glowscotland.org.uk\/gc\/hydnsecscis2revision\/files\/2014\/10\/Space-a.png\" "\\"Space")
<\/a><\/p>\nSpace Travel<\/strong><\/p>\n <\/strong><\/p>\n Newton<\/strong>\u2019s 3rd<\/sup> Law<\/strong><\/p>\n \u201cEvery action has an equal and opposite reaction\u201d<\/p>\n This law is used when dealing with the propulsion of rockets<\/strong> and spacecrafts:<\/p>\n The burning gas is forced backwards out of the rocket. At the same time the gas exerts a force on the rocket which is equal in size but opposite in direction. This force pushes the rocket forwards.<\/p>\n <\/strong><\/p>\n Newton\u2019s 1st<\/sup> Law<\/strong><\/p>\n \u201cAn object will remain stationary or will travel at a constant velocity, provided there are no unbalanced forces acting.\u201d<\/p>\n A rocket in space will continue at a constant speed (even without boosters) since there is no air resistance or friction to slow it down.<\/p>\n Mass and Weight<\/strong><\/p>\n Mass is measured in kilograms (kg). It is a measure of the amount of matter making up an object. The mass of an object does not change<\/span>.<\/p>\n Weight is measured in Newtons (N). It is the force on an object exerted by gravity. Weight will change<\/span> depending on the gravitational field strength, g.<\/p>\n <\/strong><\/p>\n <\/strong><\/p>\n <\/strong><\/p>\n <\/strong><\/p>\n <\/strong><\/p>\n <\/strong><\/p>\n <\/strong><\/p>\n <\/strong><\/p>\n Friction<\/strong><\/p>\n Friction is a force produced when two surfaces move over each other.<\/p>\n Friction is an opposing force. It acts against the motion of an object and will try to prevent an object moving.<\/p>\n Friction could be reduced here in a number of ways, e.g. using wheels or rollers.<\/p>\n In space travel, friction can be problematic during take-off. The rocket must be streamlined or aerodynamic to reduce friction due to air resistance.<\/p>\n On re-entry, friction between the rocket and the atmosphere causes the rocket to heat up. Heat shields are required to prevent the rocket from burning up.<\/p>\n On re-entry, friction is also helpful in slowing the rocket down.<\/p>\n Close to touch down, parachutes are used to increase air resistance (friction) and slow the rocket down further.<\/p>\n Life Elsewhere?<\/strong><\/p>\n For life to exist on earth two things are required: <\/p>\n 1. Liquid water<\/p>\n 2. Oxygen rich atmosphere<\/p>\n Planets or moons that have liquid water may support life.<\/p>\n Planets outside our solar system are known as \u201cexoplanets\u201d. Many have now been discovered including some which may have liquid water.<\/p>\n","protected":false},"excerpt":{"rendered":" Definitions Space Travel Newton\u2019s 3rd Law \u201cEvery action has an equal and opposite reaction\u201d This law is used when dealing with the propulsion of rockets and spacecrafts: The burning gas is forced backwards out of the rocket. At the same time the gas exerts a force on the rocket which is equal in size but … Continue reading “Journey to Space Hw’rk Wk 6”<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-105","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecscis2hwrk\/wp-json\/wp\/v2\/pages\/105","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecscis2hwrk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecscis2hwrk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecscis2hwrk\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecscis2hwrk\/wp-json\/wp\/v2\/comments?post=105"}],"version-history":[{"count":1,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecscis2hwrk\/wp-json\/wp\/v2\/pages\/105\/revisions"}],"predecessor-version":[{"id":115,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecscis2hwrk\/wp-json\/wp\/v2\/pages\/105\/revisions\/115"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecscis2hwrk\/wp-json\/wp\/v2\/media?parent=105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/a> <\/p>\n<\/a><\/p>\n<\/a><\/p>\n