Net force, also known as resultant force, is a vector quantity
produced when two or more forces act upon one object. The
concept of net force is the same as the mathematical concept of
vector addition. Let's talk about net force. This is also
sometimes called resultant force, those two words are used
interchangenly and basically what this is, is the vector that's
produced when 2 or more forces act together. Remember anything
that has distance and magnitude we can depict as a vector. So
let's look at a couple of examples or how you can calculate a
net force on an object okay. Let's take for example a
helicopter, you may notice when helicopters go up and down they
are completely vertical right? But when they want to go forward
they need to actually tilt, that's to create this thrust where
they're pushing air in that direction which is causing a force
in that direction. I'm going to call that f1 okay but how come
that a helicopter that's tilted in this direction isn't going up
in that direction? Well that's beca