Physic 25 June

Newton’s Three Laws and me:

a truck collides with another truck and the truck stops, but the driver keeps going The rock in this video wont move unless someone moves it. Newtons Second Law Acceleration increases with force and decreases with mass. Two objects of different weights are thrown off of a roof, you may assume that the heavier object will hit the ground first, but according to Newtons Second Law, the heavier objects acceleration decreases because it has more mass. The truth is, both objects will hit the ground at the same time. Another example of Newtons 2nd Law is that it is easier to push an empty shopping cart than a full one. If pushed with the same amount of force, the empty one will go farther while the full one will be harder to stop. Newtons Third Law For every action there is an equal and opposite reaction. When a rocket blasts off, the thrust produced pushes against the ground, forcing the rocket up When walking, you are actually pushing on the earth, and the earth pushes back, causing you to move.
The same applies to cars, bicycles, and boats.


2.Our “Energy Efficient” Culture:
Change the Culture
Take inventory of your office space. How many employees have space heaters at their desks? Minifridges? Christmas lights still blinking away? It's time to get ruthless. First, create an inviting area for shared microwaves, coffee makers and combination printer-fax-copiers. Then ban cubicle energy hogs and challenge employees to change their culture. Everyone should make a point of turning off lights, shutting down unused appliances and wearing a sweater in lieu of using a heater. Try efficiency contests among departments (with prizes!) to spark interest.





3.Descartes has a lot to answer for!

Descartes believes that his "false opinions" has deceived him. The opinions, he worried about, are the information he learned from the time he is born, such as if the earth is round or flat also Descartes wants to break down his 'house' of knowledge because he thought that all the things he knew he accepted without any proof. He wants to get rid of that information and rebuild his experience based on scientific, proven facts.