oat physics unit 3

i observe the observer until it ________________________________

newtons first law

A body at rest will stay at rest, and a body in motion will stay in motion and move in a straight line unless acted on by another force.

newtons second law

The acceleration of an object is directly proportional to the magnitude of the net force applied (F = ma).

newtons third law

When two objects interact, they apply a force to each other that is equal in magnitude and opposite in direction.

mass

measure of inertia of an object (property of the object itself)

weight

The force exerted on an object by gravity. W = mg.

normal force

The force perpendicular to the surface that an object is contacting.

free body diagram

depicts all forces acting on an object. When there are multiple masses, an FBD needs to be made for each object.

static friction

Frictional force between two surfaces that are not moving relative to each other. The static frictional force increases as applied force increases.

kinetic friction

Force that opposes the motion of an object while it is moving.

friction force graph

coefficient of friction

unitless value between 0 and 1 that tells you the amount of resistance two objects have when sliding against each other.

tension

a (pulling) force carried out by a rope or cable attached to an object. It sometimes needs to be broken up into X and Y components.

tension for a hanging object

• T = mg + ma

• Upward motion = positive acceleration, downward motion = negative acceleration.

newtons fourth law

sometimes when you try to fart and a lil shit come out