AP Physics U2

Center of mass

Location where if single force is exerted on object, the object won’t rotate.

Objects with uniform density have a CoM at the…

center of the object

A system is in equilibrium when either…

It is at rest or moving at a constant speed

Only interactions ___ to systems can cause changes to it.

external

For two or more block systems, consider them as ___ ____ when adding up all forces.

one object

If mass is constant…

Fg is prop. to acceleration

When trying to find the density of planets p=m/v, use the volume equation….

V = 4/3(pi)r³

The more inertial mass an object has…

The harder it is to accelerate it.

Tangential a is tangent to its…

path

An object can accelerate due to ___ ____, which can _____ to a ___ amount.

static friction, increase, max

How would a graph of static and kinetic friction look like on an object being pushed until it moves.

Like this!

when pulley has mass, it causes less ___ on an atwood machine or something similar

acceleration!

Heavy rope key principles

Tension at Bottom

Only supports the block:

Tension at Top

Supports the block and the rope:

(assuming uniform rope).