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PHYSICAL SCIENCE CONSTITUENTS AND STRUCTURE

• By Souvik Roy

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INTRODUCTION ON PHYSICAL SCIENCE CONSTITUENTS AND
STRUCTURE

• Physical science is very vast. Its components
  present earth, ocean, atmosphere. Physical
  Science is a part of natural science that
  describes energy and inanimate natural objects.
  Physical science inanimate objects are chemistry,
  physics, and astronomy.
• The basic concept of mechanics is that a force
  applied at one point can overcome friction,
  gravity, and other forms of resistance to produce
  motion at another.
• This physical law has been long understood, and
  inventors de- vised machines in order to amplify
  the effect, allowing larger amounts of resistance
  to be overcome with less power.

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History of Physical Science

• Archimedes, a Greek mathematician, made early
  strides in understanding the mathematics
  underlying physics. Legend has it that while
  bathing he inspired by observing the displacement
  of water. His insights helped in hydraulics and
  in the basic principles of leverage as well.
• He determined that the force needed to leverage
  an object declined with its distance from a
  fulcrum. In the 1500s Nicolaus Copernicus and,
  subsequently, Galileo Galilei and Johannes Kepler
  revolutionized humankinds understanding of the
  planetary motion. Their work relied not just on
  astronomical observations. The experiments with
  moving bodies and an understanding of inertia and
  solar system and the rules regarding the effects
  of force over distance.

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WHAT IS WORK in Physics?

•  Scientists have refined Newtons laws and their
  implications. All mechanics is fundamentally
  about motion. Closely related to all three of
  Newtons laws of motion is the concept of work.
  To a scientist, work necessarily involves motion.
  Work is produced in a given body by an external
  force that is applied at least partly in the
  direction of movement. It is measured as a
  transfer of energy be- tween the objects. Thus
  work might involve compressing a gas, rotating a
  shaft. Work applying leverage, or count- less
  other movements or operations necessary in a
  society that depends on machines. Two other
  concepts critical to Newtons laws of motion are
  force and inertia.
• Force any action that has the ability to
  maintain, alter, or distort the motion of an
  object. Force has magnitude and direction.
  Inertia is a property inherent in a body by which
  it opposes any impulse to begin or change in
  movement. A NEWTONIAN DEFINITION of work, given
  in terms of force and inertia, applies to many
  realms of the physical world-including the
  efforts of this 1943 prison work crew.

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