Evil or God

Topics: Mass, General relativity, Gravitation Pages: 2 (568 words) Published: March 4, 2013
MANUEL FIGUEROA 2/14/13

WHY IS THE TOPIC IMPORTANT TO
THE SOCIETY:
Gravity and friction are two forces that work together to allow life as we know it on earth. They are balanced forces. There is no movement without first overcoming friction, which is why a heavier object falls faster due to gravity than a lighter object. A heavy object is not resisted by air friction, while a very light object is (which causes it to fall more slowly).

3 advantages of friction:
1.)it is becomes difficult to walk on a slippery road due to low friction. When we move on ice it becomes difficult to walk due to low friction of ice.
2.)we can not fix nail in the wood or wall if there is not friction.it is friction which holds the nail.
3.)a horse can not pull a cart unless friction furnishes him a secure foothold

3 disadvantages of friction:
1.)the main disadvantage s of friction is that it produces heat in various parts of machines. In this wat some useful energy is wasted as heat energy.
2.)due to friction we have to exert more power in machines.
3.)due to friction noise also produced in machines
Friction force and what does it state:
newton’s law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Example of everyday life when we use friction:
Friction makes walking and running possible. If there were no friction ,we would be unable to move our legs on the ground without slipping and falling, just like we would experience when we try to move on a slipping surface, such as ice which offers very little friction underfoot.

3 advantages of gravity:
1. Because of earth's gravity we are able to stay on the top of it and other creatures as well.

2. Because of gravity...
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