8.10 Forces

Newtons

Force is measured in _______

air resistance

Fluid friction acting on an object moving through the air

how hard the surfaces push together and the types of surfaces involved

The strength of the force of friction is dependent on two factors:

Gravity

A force that pulls objects toward each other

Laws of Universal Gravitation

Newton's law that all objects are attracted to one another and that the force of attraction is proportional to the object's quantity of matter and inversely proportional to the square of the distance between them.

terminal velocity

The greatest velocity a falling object can achieve

Mass

A measure of the amount of matter in an object

Unbalanced forces

If the forces are unbalanced the object will move in the direction(s) of the force(s) acting upon it

Distance

Measure of how far apart each object is from one another

Net force

The combination of all forces acting on a single object

Friction

The force that two surfaces exert on each other when they rub against each other

static, sliding, rolling, and fluid friction

What are the different types of friction?

balanced forces

When all forces cancel out each other out (Net Force =0), the the forces are in balance

9.8 m/s2

acceleration of objects near the Earth due to gravity

Forces

pushes or pulls between objects

free fall

the motion of a falling object when the only force acting on it is gravity