Sunday, March 7, 2010


This week in science, we started the unit of Energy we learned the different types of energy that there are and how they could effect us in the simplest of ways.
Some things that you should know before identifying what types of energies that there are and how they effect the different systems that there are.
Systems: a group of objects that strive for one goal.
We discussed what gave certain objects such as rubber bands, blocks and cars "chalk smashing ability".

For Example, we give a block chalk smashing ability, by lifting the block directly above the chalk that is standing on a counter by it self. and simply drop the blocks. This gives the blocks"chalk Smashing Ability.

Identifying systems: You could identify what is in your system by what different forces are exhibited on the system. For example, you have the earth trying to pull down an elephant that is in the air from jumping on a trampoline.
An initial system is when no external force is exerted on the system.
The Final System is when an amount of force has been exerted on the system and something occurred in the system.

Energy
When we are touching something, pushing something or even feeling something, we are exerting energy on that object. When we are lifting a book from the ground, we are applying a force upward defying the force Earth and giving the book "energy of going up".


Formulas:
E/M=A
Energy divided by mass equals acceleration. We know that all objects on Earth accelerates at a rate of 9.8 m/s or rounded up to 10 m/s. So we know that E/M=10
if we find out that the energy or mass of an object, we could calculate the missing variable that is left out in the formula.