4.1, 4.2 Turning effect, etrc

Centre of gravity: p__ at which the w__ of an o__ a__to a__

point, weight, object appears, act

an object is stable when the centre of g__ lies a__ its base

gravity, above

wider object = l__ centre of gravity, m__ stable (sumo)
narrower = h__ center of gravity, l__ stable

lower, more, higher, less

moment: t__ e__ of a f__
𝜏 = __

turning effect, force, Fd

couple
> p__ of forces that acts to produce r__ only
> perp. distance is between the 2 f__, not to the p__
> Fnet = __, thus if F=ma, then a = __

the forces are:
> e__ in m__
> o__ in d__
> p__ to distance

pair, rotation, forces, pivot, 0, 0, equal, magnitude, opposite, direction, perpendicular

princple of moments
> in e__, s__ of c__ m__ about a p__ is e__ to s__ of a__ m__

equilibrium, sum, clockwise moments, point, equal, sum, anticlockwise moments

A system is in e__ when:
> n__ r__ f__
> n__ r__ m__

equilibrium, no resultant force, no resultant moments