Forces in 2D motion???

A force that is analyzed in a 2D motion is vector with 2 components. Since they're 2D, they're looked at on the X and Y axis.

In Uniform Circular Motion, a NET FORCE drawing towards the inside of the circle causes objects to move in circles because it's at a constant speed. But it's constantly accelerating because the object is constantly changing direction 
 -the direction of an object in circular motion's acceleration is inwards. 
-objects in orbit move in uniform circular motion around another object. 
-Planets and satellites are able to orbit because they have net force acting upon them and it keeps them moving in circles at a constant speed=gravity=keeps earth orbiting the sun; pulling us towards it

Inside the iPad

My iPad is a commonly used source of technology in my life. It's very complex and can do a thousand things, but only for a certain amount of time until the battery runs out. It contains a lithium-polymer battery includes lithium ion that grows bigger so that it can store a greater charge.  It allows lithium ions to move from the negative conductor of which the electricity is leaving UPHILL, exemplified in the following image:

The Class Connection

In class, we used lemons as a battery!!!
We used a penny for negative charge and a nail for positive charge stuck them into the lemon on both sides.  The lemon contains a lot of electrons so when we connected the penny and the nail with a cord, electrons could flow! Amazing!!!