EXSS1018 Lecture Notes - Lecture 6: Ground Reaction Force, Net Force, Buoyancy

• School: University of Sydney
• Department: Exercise and Sport Science
• Course: EXSS1018
• Professor: Dr Edouard Rene Ferdinands

Document Summary

Causes motion (acceleration) or change in shape of an object. Force must be applied to an object at a particular point = point of application. Line of action = direction/acceleration of force (vector) Eg. muscle has point of application (attachment) and line of application. Mass is measure of how much matter makes up the object more matter = more mass. Weight = mass x acceleration by gravity (gravitational force) Eg. mass of 85kg, weight = 85 x 9. 8. More mass = requires more force to move. Mass = measure of resistance to change in motion. Force exerted on a body by the pull of gravity. Magnitude of force = mass x acceleration due to gravity. Point of contact = centre of gravity. Every body continues in its state of rest or of uniform motion (constant velocity) in a straight line unless it is compelled to change that state by external forces. E(cid:395)ual fo(cid:396)(cid:272)es a(cid:396)e (cid:271)ala(cid:374)(cid:272)ed a(cid:374)d the (cid:373)ove(cid:373)e(cid:374)t does(cid:374)"t (cid:272)ha(cid:374)ge.