AP physics questions i get wrong + explanations/catagory

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