DYNAMIC #1

For Mechanical Engineering college textbooks that I follow, I begin this edition will begin to use English. if there will be spelling errors please provide comments and given the correct revision. may be useful.

Dynamic lectures I attended was taught by Mr. Ir. Sibagio, M.Sc. He is one of the senior lecturer who teaches in the Department of Mechanical Engineering, Gadjah Mada University, Yogyakarta.

Books that became the main reference and source of this script is the Engineer of Mechanics, Dynamic work of JL Meriam and L. G. Kraiger. Books available to me have been translated from the original book by Mr. Tjahtjana Adhi and Mr. Subagio with the title of publisher of Engineering Mechanics Dynamics 2nd Edition Erlangga.

# First Meeting Date August 23, 2010 Physical Science in general has a branch called scholarly Mechanics. Mechanics In the science is divided into 2, Statics and Dynamics, from Dynamics was divided into 2 again, the Kinematics and Kinetics. Kinematics is the field of mechanics that studies the relationship of the forces acting on an object without considering the forces that cause movement in the object, while the Kinetic is the field of mechanics that studies the relationship of the forces acting on an object by observing the movement generated by the style.

in Chapter 1, called parts of this introduction, lecture is not too much attention to things that are often in tell to students such as conversion of units because each student has a reference book and shared in quite brief. I will provide about yourself that I took from the book cannon for this diktat has several useful addition.

Problem Solved: (See p.11 in the edition Erlangga)

1. Determine the mass of people in Newton, who weighs 85 kg. In addition, change the weight of the person's location in the pound and calculate its mass in lb-sec ² / ft (Slug) replied:

a. Weight is a unit of force with the symbol W of where the equation is:

W = mg (W = unit of force, Newton; m = mass unit, kg; g = acceleration of gravity with the number 9.81 m / s ² for the acceleration of gravity on earth) .

equations (the dot between the 2 signs are multiplying while the dots between a number that indicates a certain amount is a comma in Indonesia):

W = m.g

W = 85 kg. 9.81 m / s ²

W = 833.85 N or in the round to be 834 N

b. weight people in lb (pounds) where 1 kg = 2.204622476 lb so 85 kg = 187.3929105 lb or 187.4 rounded lb (187.5 lb cannon in the book this is not too problematic)

c. m = lb / (ft / s ²) m = 187.4 lb / 32.1740 ft / s ² m = 5.824578852 rounded Slug or Slug 5.82 at the beginning of this introduction we will gain more knowledge about the conversion of units from 1 unit to another.

The next chapter we will go into Chapter 2, Namely Particle kinematics.

Chapter 2 Kinematics PARTICLES as I have explained above, that the kinematics are the forces acting on an object regardless of the force that causes the displacement object. To be selected parikel, because meripakan unit dati a point where this is the basis of the Physics. in this particle kinematics, we first focus on the discussion of Newton's laws I, II, and III, which reads:

Newton's Law I = particle will remain stationary / moving straight ahead with a constant velocity when no unbalanced forces acting on an object

Newton's Law II = - particle velocity is directly proportional to the force acting on it and the direction of his style. - The net force acting on the particle is proportional to the momentum of the particle and the direction of his style

Newton's Law III = (Action = Reaction)

Dynamics is closely related to Newton's Second Law,

F = ma (F = force, N; m = mass, kg; a = acceleration, m / s ²)