Engineering science

• Definition: Distance

  Distance is covered regardless of the direction.

  Messured in meters
• Definition: Displacement

  Is a straight line distance that a body moves

  Messured in meters

  Simbole: S
• Definition: Speed

  Is the rate of change of distance
• Definition: Velocity

  Is the rate of change of displacement or Speed in a given direction
• Definition: Acceleration

  When a speed of a body increase it is said to be accelerating, when it decreases it is said to be retarding/negative accelerating
• Definition: Velocity

  Rate of change of displacement
• Uniform accelerating

  • a= v-u/t
  • v= u+at
  • a= accelerating (m/s2)
  • V= final velocity (m/s)
  • u= initial velocity (m/s)
  • t= time (s)
  • s= distance (m)
• Displacement (accelerating body)

  • S=1/2(u+v)t
  • S=ut+1/2at square
  • V square =u square +2as
• Newton's first law: A body continues in its state of rest or of uniform motion in a straight line unless it is compelled by an external force to change that state
• Newton's second law: When a body is acted upon by an external force, the rate of change of momentum is proportional to, and in the same direction as, the external force.
• Newton's third law:

  For every force, there is an equal and opposite force
• The Newton:

  Is a force that will cause a body with a mass of 1kg to accelerate at 1m/s square
• Definition of Work:

  When a force moves through a distance, work is done

  W=FxS

  W= work done in Joules

  F= effective force in Newton

  S= distance move in meters
• Definition of Joule:

  Joule is the amount of work done when a force of 1N moves through a distance of 1m
• Definition Energy:

  Energy is the capacity to do work

  Unit: Joule (J)
• Forms of energy:

  • Thermal
  • Chemical
  • Electrical
  • Potential
  • Kenetic
  • Magnetic
  • Atomic energy
• Definition of Potential energy:

  Is the energy a body possess by virtue of its position or state of strain.

  Ex: accar on top of a downhill
• Definition of Kenetic energy:

  Is the energy a body possess by virtue of its motion.

  Ex: flywheel
• Definition of Power:

  Power is the rate of doing work or Power is the rate at which energy is used up.
• Definition of Momentum

  Is the quantity that a body possess as a result of its motion.
• Definition of Law of conservation of energy:

  Energy can not be created or destroyed but can be changed from on form to another.