Intro to force and motion

force

a push or a pull on an object

contact force

is a push or a pull on one object by another that is touching it

non contact force

a force that one object can apply to another object without touching it.

gravity

is a attractive force that exists between all objects that have mass

mass

is the amount of matter in an object

weight

is the gravitational force exerted on an object

friction

is a force that resists the motion of two surfaces that are touching.

mass 

is not a force

force

a vector mesurment, it has both strength and direction

formula

mass * Accelerationl

arros are used to represent force 

strength and direction

rolling friction

occurs between 2 surfaces in motion and is a wheel or ball of sort

sliding friction

when one solid surface slides over another

static friction

surfaces in contact one at rest

Fluid/air friction

relates to objects moving in fluid or air

lubricant

used to reduce friction

newtons first law of motion

if the net force on an object is zero, the motion of the object does not change

Net force

The combination of all the forces acting on an object

balanced force

force acting on an object that combine and form a net force of zero

Unblanaced force

Forces acting on an object that combine and form a net force

inertia

the tendency of an object to resist a change in its motion