I need help. I need to define friction. I know what it is but cant figure out how to put them in words with out being to long written.
Then I have two more ?s
What are the three types of friction?
What is the speed of acceleration due to the force of gravity?
please help
The second definition is good:
http://encarta.msn.com/encnet/features/dictionary/DictionaryResults.aspx?refid=1861613545
types of friction: rolling, kinetic, sliding, air, static,
The acceleration due to gravity is on the average 9.81m/s^2 at sea level.
Do wheels reduce friction?
Friction is a force that opposes the motion of objects that are in contact with each other. It can be thought of as the resistance between two surfaces sliding, rolling, or rubbing against each other. To define it concisely, friction is the force that occurs when two objects come into contact and try to move past each other, resulting in a resistance that opposes their motion.
Now, moving on to the three types of friction:
1. Static Friction: This type of friction occurs when there is no relative motion between two objects in contact. It is the force that keeps an object at rest when a force is applied to try to move it. For example, when you try to push a heavy box and it doesn't move initially, the opposing force you feel is static friction.
2. Kinetic Friction: Kinetic friction is the resistance encountered when two objects are moving relative to each other. It acts in the opposite direction to the motion and slows down the objects. For instance, when you slide a book across a table, the resistance you feel is kinetic friction.
3. Rolling Friction: Rolling friction refers to the force that opposes the motion of an object as it rolls along a surface. It is generally lower than sliding friction because the surfaces in contact are in the form of a rolling motion, reducing the amount of resistance. A good example is a ball rolling on the ground, where the rolling friction allows it to move smoothly.
Regarding the speed of acceleration due to the force of gravity, it is approximately 9.81 meters per second squared (m/s^2) at sea level on average. This value is commonly referred to as the acceleration due to gravity or the acceleration of free fall. It represents the rate at which an object accelerates when falling towards the Earth's surface under the influence of gravity.
If you have any more questions or need further clarification, feel free to ask!