PRELIMS

• Mechanics – is the study of interrelation of force, matter and motion.
• Kinematics – refers to the study of how bodies move without regard to the causes of motion
• Dynamics – is the study of the causes of motion.
• Statics – is the study of bodies at rest.
• Force – is any influence that is capable of producing  a change in the motion of a body. It is the action of one body to another.
• Concurrent Force – are forces acting at a point on a body, or whose lines of action converge at a point. There are forces coming from a common origin.
• Non-concurrent force – are forces acting on a body whose lines of action do not converge at a point.
• Magnitude – means a number and a unit of measure.
• Scalars – are quantities having magnitude but no direction. These are quantities that can be completely specified by a number and a unit.
• Vectors – are quantities with magnitude and direction
• Arrow head – indicates the direction of the vector.
• Length of the arrow – represents the magnitude of the vector.
• Tail – represents the origin of the vector.
• Displacement – represents a straight line distance and direction from the point of origin to the end point or terminal point.
• Vector addition – it is the process of finding the resultant of two or more forces.
• Resultant – it is a single force that will produce the same effect on the body as that produced by two or more forces.
• Equilibrant – is the oppositely directed force of the same magnitude as the resultant.
• Graphical Method – is the method forces or vectors are drawn to scale. The magnitude of the resultant is measured by a ruler and the direction by a protractor.
• Analytical method – is the method that makes use of formulas or equations in mathematics.
• Kinematics – the study of motion which deals only on the nature of motion without taking into consideration the causes of motion.
• Motion – a continuous change of position with respect to a certain reference point.
• Translation or Rectilinear motion – is the motion of a body in a straight line.
• Uniform motion – it is a motion of a body where equal distances are covered in equal intervals of time without changing its directions; is one with a constant velocity.
• Uniformly accelerated motion – motion in which the velocity is not constant but increases or decreases by a uniform rate (constant acceleration).
• Displacement – the change of position of a body; it refers to the straight-line distance between the starting and endpoints. It is a vector quantity.
• Variable translation – is motion in a straight line where velocity is not uniform. Velocity may be variable, although the direction remains constant.
• Distance – the position of an object as measured from a reference point; it refers to the total path’s length and is a scalar quantity.
• Speed – distance traveled per unit of time; indicates only the distance ( no direction) and time. It represents only the magnitude of velocity and therefore it is a scalar quantity.
• Velocity – the time rate of change of displacement. It is a vector quantity.
• Instantaneous velocity – the velocity at a given time instant of time.
• Acceleration – rate of change in velocity. If the velocity is increasing by a uniform rate.
• Average speed – is equal to the total distance traveled in a given unit of time.
• Average velocity – the total displacement divided by the elapsed time.
• Average acceleration – rate of change of velocity.
• Mechanics – The study of the interrelation of force, matter, and motion.
• Dynamics – The study of the causes of motion.
• Statics – The study of bodies at rest.
• Force – It refers to any influence that is capable of producing a change in the motion of the body.
• Magnitude – it means a number and a unit of measure.
• Scalars – They are quantities having magnitude but no direction.