physical therapy

• A push or pull upon an object resulting from the object's interaction with another object.

  FORCE
• what unit is equivalent of unit kg.m/s2

  Newton (N)
• TYPES OF FORCES


  *CONTACT FORCE

  *NON-CONTACT FORCE
• Two interacting objects are physically in contact with each other.

  *CONTACT FORCE
• Two interacting objects are not in physical contact with each other, but are able to exert a push or pull despite the physical separation.


  *NON-CONTACT FORCE
• 5 parts of contact force

  Tensional

  Friction

  Normal

  Applied

  Air Resistance
• 3 parts of non-contact force

  Gravitational

  Magnetic

  Electric
• COMMON FORCES


  APPLIED FORCE (Fapp)
• (Fapp) stands for?


  APPLIED FORCE (Fapp)
• Force which is applied to an object by another object or by a person.

  APPLIED FORCE (Fapp)
• (FT) stands for?


  TENSIONAL FORCE (FT)
• Force which is transmitted through a string, rope or wire when it is pulled tight by forces acting at each end.

  TENSIONAL FORCE (FT)
• Directed along the wire and pulls equally on the objects on either end of the wire

  TENSIONAL FORCE (FT)
• (Fn) stands for?


  NORMAL FORCE
• Support force exerted upon an object which is in contact with another stable object.

  NORMAL FORCE (Fn)
• (Ff) stands for?


  FRICTIONAL FORCE
• Force exerted by a surface as an object moves across it or makes an effort to move across it.

  FRICTIONAL FORCE
• Opposes the motion of the object.

  FRICTIONAL FORCE
• Varies directly with load

  FRICTIONAL FORCE
• formula of frictional force?

  Ff=m Fn

  Ff - Frictional force

  m - coefficient of friction

  Fn - normal force
• (Fair) stands for?


  AIR RESISTANCE
• Special type of frictional force which acts upon objects as they travel through the air.

  AIR RESISTANCE
• Always opposes the motion of the object.

  AIR RESISTANCE
• (Fg) stands for?


  GRAVITATIONAL FORCE
• force with which the earth, moon, or other massive body attracts an object towards itself.

  GRAVITATIONAL FORCE (Fg)
• Equal to the weight of the object as given by the equation: Fg=mg

  GRAVITATIONAL FORCE (Fg)
• Fg stands for?


  Fg- gravitational force (weight)
• m stands for?


  mass
• g stands for?


  acceleration due to gravity (9.8 m/s2)
• the shape of the Earth, it has bulging equator and squeezed poles.

  OBLATE SPHEROID
• either of two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon, marked by the longest and shortest days.

  SOLSTICE
• an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination.

  ECLIPSE
• the astronomical model in which the earth and planets revolve around the sun.

  HELIOCENTRISM
• any theory of the structure of the solar system ( or the universe) in which earth is assumed to be at the center of it all.

  GEOCENTRISM
• In this term, it stated that earth is assumed to be at the center of it all.

  GEOCENTRISM
• first to proposed a spherical Earth.

  PYTHAGORAS and his pupils
• supported Pythagoras proposal through his observations of the shadows that the Earth cast on the moon during a lunar eclipse.

  ANAXAGORAS (500 to 430 B.C)
• He observed that during a lunar eclipse, the Earth's shadow was reflected on the moon's surface.

  ANAXAGORAS (500 to 430 B.C)
• in how many bc most of the Greek believed that Earth was round, not flat.

  5oo B.C
• listed several arguments for a spherical Earth which included the positions of the north star

  ARISTOTLE (340 B.C)