Physics: Mechanics Research Paper

Topics: Force, Energy, Classical mechanics Pages: 11 (3147 words) Published: February 4, 2013
PHYSICS: Mechanics
I. Introduction to Physics
II. Vectors
III. Kinematics
IV. Laws of Motion
V. Impulse and Momentum
VI. Work, Power, and Energy
VII. Free Fall
VIII. Projectile Motion
IX. Buoyancy
* Archimedes Principle
* Pascal Principle
* Bernoulli’s Principle
X. Pressure
I.
II. Introduction to Physics
Physics → the science of matter and energy and their interaction with each other. The Role of Physics in Science
In a broader sense, physics can be seen as the most fundamental of the natural sciences. Chemistry, for example, can be viewed as a complex application of physics, as it focuses on the interaction of energy and matter in chemical systems. We also know that biology is, at its heart, an application of chemical properties in living things, which means that it is also, ultimately, ruled by the physical laws.

Branches of Physics
1. Mechanics is the branch of Physics dealing with the study of motion 2. Heat and Thermodynamics-the physics of heat
3. Electromagnetism-the study of electrical and magnetic fields, which are two aspects of the same phenomenon 4. Waves, Acoustics, and Optics
5. Modern Physics

Scientific Method
-a logical and scientific way of finding a solution to a certain problem -The goals of the scientific method are uniform, but the method itself is not necessarily formalized among all branches of science. It is most generally expressed as a series of discrete steps, although the exact number and nature of the steps varies depending upon the source. Steps:

1. Identification of the problem-determine a natural phenomenon (or group of phenomena) that you are curious about and would like to explain or learn more about, then ask a specific question to focus your inquiry. 2. Gathering Data and Observation-this step involves learning as much about the phenomenon as you can, including by studying the previous studies of others in the area. 3. Formulate a hypothesis – using the knowledge you have gained, formulate a hypothesis about a cause or effect of the phenomenon, or the relationship of the phenomenon to some other phenomenon. * Null Hypothesis- it suggest the absence of a relationship between independent and dependent variable * Alternative Hypothesis- suggest the presence of relationship 4. Test the hypothesis - plan and carry out a procedure for testing the hypothesis (an experiment) by gathering data.

5. Analyze the data – use proper mathematical analysis to see if the results of the experiment support or refute the hypothesis. TRIVIA!

A rubber band shrinks when heated and expands when cooled because of the change in its Entropy state.

If you yelled for 8 years, 7 months and 6 days, you would have produced just enough sound energy to heat up one cup of coffee.

III. Vectors
What are Vectors and Scalars?
Vectors- requires both magnitude and direction for its complete description -a physical quantity

Scalar- requires magnitude for its complete description
-a physical quantity expressed in terms of magnitude alone

Direction And Magnitude
All of the previous development has been limited to the case of motion along a straight line. We’ll treat motion in two dimensions and eventually in three dimensions. These extensions require that we make use of the vector property of displacement and velocity. If we wish to describe the motion of an automobile, we could say that the speed is 60 mi/hr. However this is not a complete specification of the motion; more information is contained in the statement that the velocity is 60 mi/hr in the direction northeast. Velocity is a quantity that has both magnitude and direction. Such quantities are called vectors. Another such quantity is displacement: an object may move a certain distance but the vector description must include the direction of motion as well as the distance travelled. Quantities...