newton's law

• 

  Force is a push or a pull exerted by an object on another
• Force between two bodies that are in contact with each

  other is called contact force
• muscular force, friction force, and Spring force is an example of contact force
• Force that acts even if the interacting bodies are

  separated by a distance is called noncontact or action

  at a distance force
• Examples of noncontact forces are gravitational force,

  electrostatic force between charged bodies and

  magnetic force
• Gravitational force is the attractive force exerted

  by objects with mass
• 

  Electromagnetic force is the force that holds

  atoms and molecules together
• Strong nuclear force is the force between

  protons and neutrons in a nucleus
• Weak nuclear force plays a role in the radioactive

  decay of some nuclei
• Grand Unified Theory is the theory that

  attempted to unify strong nuclear force, weak

  nuclear force, and electromagnetic force
• Theory of Everything is theory that tried to unite

  all fundamental forces
• only the electromagnetic force and the

  weak nuclear force have been successfully united to

  form the electroweak force through the efforts of

  Sheldon Glashow Abdus Salam and Steven

  Weinberg in the 1970 ’ reducing the fundamental

  forces from four to three
• ISAAC NEWTON

  1. He was credited for being the first to describe the motion of massive objects and formulate the three laws of motion. Newton’s laws of motion constitute the fundamental principles of dynamics, which deals with force in relation to the motion of an object
• Newton’s first, second, and third laws

  of motion are also called

  1.

  Law of Inertia

  2.

  Law of Acceleration

  3.

  Law of Interaction
• The law of inertia states that a body at rest

  will remain at rest and a body in motion will

  continue to move with constant velocity

  unless acted upon by an unbalanced

  external force.
• A resultant force that is not equal to zero is considered an

  unbalanced force.
• The net force or resultant force is the vector sum of all the

  forces acting on a body.
• Inertia is the property of a body that tends to resist change

  in its state of motion.
• Mass is a measure of inertia
• The greater the mass , the greater the inertia . The

  greater the inertia , the harder it is to change the state of

  motion of a body.
• Newton’s law of inertia as well as Republic Act 8750

  (otherwise known as The Seat Belt Use Act of 1999) are

  two reasons why we need to use seatbelts.
• The net force of an object is equal to the

  product of its mass and acceleration, or

  F=ma.
• The acceleration of the body is directly proportional to the

  net force acting upon it.
• Furthermore, the acceleration is inversely proportional to

  the mass of the body.
• The greater the mass of a body, the lesser the acceleration.
• 1 N = 1 kg · m/s²

  1 dyne = 1 g · cm/s²

  1 N = 10⁵ dynes
• The weight of a body on Earth is the measure of the force

  of gravity exerted by Earth on it.
• On the other hand, mass is the amount of matter of a body

  contains.
• Mass and weight are related as

  w = mg
• The mass of the body is constant while its weight

  depends on the value of acceleration due to gravity .
• Newton’s third law of motion states that for

  every action, there is an equal but opposite

  reaction.
• Work is defined as the dot product of force F and

  displacement d in the direction of the force.
• The SI unit of work is the newton meter (N · m)m), also

  called the Joule (J) in honor of James Prescott Joules.
• A smaller unit of work is the erg , which is derived from

  ergon, the Greek word for “ work ”.
• 1 J = 1 N · m

  1 erg = 1 dyne · cm

  1 J = 10⁷ ergs
• Energy is defined as the capacity to do work
• Energy comes in many forms. These include light energy,

  chemical energy, heat energy, and electrical energy
• Mechanical Energy is the sum of the potential and

  kinetic energies of the body.
• Potential energy represented by U is the energy

  possessed by a body by virtue of its position or

  configuration
• There are two types of potential energy

  

  Gravitational Potential Energy (U g)

  

  Elastic Potential Energy (U s)