AS101 Lecture Notes - Lecture 5: Tide, Net Force, Chemical Element
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As-(cid:1005)(cid:1004)(cid:1005) chapter (cid:1007). 5: isaa(cid:272) ne(cid:449)ton, gra(cid:448)ity, and or(cid:271)its. Ne(cid:449)to(cid:374)"s la(cid:449)s of (cid:373)otio(cid:374) a(cid:374)d gra(cid:448)it(cid:455) had a huge i(cid:373)pa(cid:272)t o(cid:374) the future of astro(cid:374)o(cid:373)(cid:455) Speed: the rate at which an object moves (changes position); the total distance moved divided by time taken to move. Velocity: both the speed and direction of travel of an object. Acceleration: rate of change of velocity with time: the change in velocity divided by the time taken for the change to occur. Newton created 3 universal laws of motion. Law 1: an object remains at rest or constant velocity unless a net force acts to change its speed or direction. If the mass (amount of matter) of the object does not change, the acceleration is proportional to the force exerted. Law 3: forces occur in pairs, if one body attracts another, the second body must also attract the first. The acceleration due to gravity, g, is 9. 8 metres per second.
