Friday, May 4, 2012

Real Life Application

Newton's Three Laws In Real Life:

These three laws apply in most scenarios. For example, a person running in the park can apply to all three. If the person is running at a constant rate, it demonstrates the first law that states an object in motion will stay in motion unless something interferes. If the person is accelerating, the force is based off of mass and the rate of acceleration. If a person has a mass of 65 kg and is accelerating at a rate of 2.6 meters per second, the equation F=ma tells us that the force exerted is 169 N. And lastly, when the person is running, the ground gives off the same amount of force as the person. 

This picture demonstrates the last law. The wall puts an equal amount of pressure as the person does. 

Newton's Three Laws

First Law:

This law states that every object in motion will stay in motion unless an outside force interferes.
Example: If a small child is playing with a toy car and slides it across the floor, it will keep rolling until it hits a surface, such as a counter.

Second Law:

This law is based on inertia.An important equation involved with this law is F=ma. This law states that the change in velocity or acceleration is directly proportional to the magnitude of the force and inversely proportional to the mass of the object.

Third Law:

This law states that for every action has an equal and opposite reaction. For example, if a person pushes against a wall, the wall is pushing against the person as well. 

Thursday, May 3, 2012

Reflection

When studying Newton's Three Laws, I learned a lot about the laws of the universe and how it changed everything. These certain three laws explained the way objects move. Obviously, this is very important in science.
Newton's Laws were used in a majority of the forces unit. The many forces include frictional force, force of gravity, force of tension, etc. For example, when given a system such as a box sitting flat on a table with a box connected by rope hanging off the table, you must use your knowledge of the laws to determine whether the system is moving or at rest.