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Center of mass on a pivot
If an object is set on a pivot the location of the center of mass determines the direction in which the object will tilt
Atwood machine (deriving an equation using newtons second law
To get the total acceleration of the system use f = ma. Where F is the net force of the system and m is the total mass of the system.
a = F/mtotal
Apparent weight
Two blocks in free fall connected by a string do not have an affect on one another, meaning their acceleration is g
Newtons second law/elevator forces
Find the tension in the string(s) that hold up the object
Ftension = - mg = ma
If there are multiple strings add a coefficient to Ftension
Simplify that equation to Ftension = m(a+g)
Center of mass change in location mass doubling
mane wtf
in a problem with two unequal strings and a suspended ball, the steeper string will support more weight
Note 
Flashcard (86)