Forces yayyy...

The net force of an object, is the sum of all the forces acting upon it. The net force is equal to mass multiplied by acceleration. Weight, friction, and air resistance are all examples of forces. The Snorlax is not accelerating because it's net force is zero. Weight holds the object down, but the normal force of the table underneath the Snorlax, pushes it up to create a net force of zero. If a pikachu rolled a pokeball on a rough surface there would be frictional force pushing back against the force the pikachu is exerting on the pokeball. The weight plus the frictional force, plus the normal force, plus the force the pikachu is exerting on the pokeball would be the net force in this case.

Unit 4 and Forces

A force is a push or pull. It can be balanced or unbalanced. A balanced force is when two forces are acting upon an object such that the object does not accelerate because force A = to force B. Therefore there is no acceleration among balanced forces, but there can still be velocity. 

On the other hand, an unbalanced force is pretty self-explanatory... but creates an acceleration. Gravity is net (unbalanced) force. 

Inertia is the "want" of an object to stay in its current state of movement or rest.

Inertia makes sense when you think of heavy, bulky items in comparison to light, feathery objects. The heavy objects are harder to move and when they do move, they are difficult to stop once in motion. Light objects are easy to persuade to move and also easy to stop.

For example, if a vending machine were traveling at 10 mph, it would be much more difficult to stop that than something like a tennis ball.

What Happens in Vegas...

...stays in Vegas.

Similarly, what happens on the x-axis stays on the x-axis. The same goes for the y-axis. This can be summed up in the sentence, "Axes are independent."

So what does this mean?

They function without each other; the velocity on the x-axis does not affect the velocity on the y-axis.  This can be proven  in the very simple example we saw and heard in class involving two pens. Both pens were released from the same height. The difference is that one pen was just dropped while the other was projected horizontally. Both pens landed at the same time, which proves that the axes are independent of each other.