Day: 10

Today we learned that an object at rest will tend to stay at rest unless acted upon by an outside unbalanced force.

Today we proved this through a pen and paper. We stood up a pen on a sheet of paper and if we pulled the paper from beneath the pen quick enough, the pen would stay still. This was somewhat hard to achieve at first but once we got the hang of it, it was pretty cool. We also learned about why it sometimes fell, and this is due to friction. That must be how the "magic" tricks worked with the tablecloth and plates. (when the magician rips the tablecloth from beneath the set table and nothing breaks or falls, it stays in the sam position, just without the tablecloth!) We also learned about Newtons laws (which is what the pen trick revolved around) and I have them written down to remember!

Newtons Law #1: Every object continues in its state of rest, or of uniform motion in a straight line, unless compelled to change that state by external forces acted upon it.

Newtons Law #2: The acceleration a of a body is parallel and directly proportional to the netforce F acting on the body, is in the direction of the net force, and is inversely proportional to the mass m of the body, i.e., F = ma. (also known as F, ma)

Newtons Law #3: When two bodies interact by exerting force on each other, these action andreaction forces are equal in magnitude, but opposite in direction.

I have to make sure I know and understand them! And that pen trick definitely helped in the process...