class 12 mechanics notes [PDF]|NEB| Physics|

Here,in this post you will gets the notes of "Mechanics  for class 12". which contains following chapters:-

• Rotational Dynamics

• Periodic Motion

• Fluid Mechanics

which is important chapter for NEB board exam.

Mechanics is a branch of physics that deals with the behavior of physical systems under the influence of forces. It is concerned with the study of motion and how objects move and interact with each other.

The foundation of mechanics is Newton's laws of motion, which describe the relationship between an object's motion and the forces acting upon it. The first law states that an object at rest will remain at rest, and an object in motion will continue in motion in a straight line at a constant speed unless acted upon by an external force. The second law states that the acceleration of an object is directly proportional to the force acting upon it and inversely proportional to its mass. The third law states that for every action, there is an equal and opposite reaction.

Mechanics also includes the study of kinematics, which describes the motion of objects without considering the forces that cause the motion. Kinematics includes concepts such as position, velocity, and acceleration, and is used to describe the motion of objects in one, two, or three dimensions.

Dynamics is another important area of mechanics, which studies the motion of objects under the influence of forces. It includes the study of friction, gravity, and other forces that can influence the motion of objects.

Another important concept in mechanics is energy, which is the ability to do work. Mechanics includes the study of potential and kinetic energy, as well as the conservation of energy, which states that energy cannot be created or destroyed, only transferred or converted from one form to another.

In addition to the study of motion and energy, mechanics also includes the study of fluids, solids, and gases. The behavior of these materials under the influence of forces is important in understanding many natural phenomena, such as the flow of water in a river or the deformation of a metal under stress.

Mechanics has many practical applications in fields such as engineering and physics. It is used to design and analyze structures, machines, and other physical systems. It is also essential in understanding the behavior of natural systems, such as the motion of planets and stars.

In summary, mechanics is a branch of physics that studies the behavior of physical systems under the influence of forces. It includes the study of motion, energy, and the behavior of fluids, solids, and gases. The principles of mechanics are essential in many fields, including engineering and physics, and have led to many important technological advancements.

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