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• Center of Mass


  • Is a position defined relative to an object or system of objects
  • Average position of all the parts of the system weighted according to their mass
  • Is a useful reference for calculations in physics
• Geometric Center


  • Also known as Centroid
  • Is the middle part of any object or geometric figure
  • Regularly shaped object with uniform density or object made by similar material throughout
  • Has a center of mass at the object's geometrical center
• Pure Translation


  Body remains in the same orientation
• Translation Plus Rotation


  An object or body rotates around a fixed point
• Inertia


  Is the tendency of an object to resist changes in its state of motion
• Momentum


  • Is a quantity that determine the tendency of moving body to continue moving at constant velocity
  • It is the inertia of moving object
  • Dependent on two variables: mass and velocity
  • Unit: kg.m/s
  • p=mv
• Impulse


  • Is the change in momentum of an object
  • It is a product of the form and time over which the force acts
  • Unit: N.s
• Elastic Collision


  Total kinetic energy is the same before and after the collision
• Inelastic Collision


  Total kinetic energy after the collision is less than the total kinetic energy before the collision
• Newton's Law of Restitution

  When two objects collide, their speed after the collision depends on the material they are made of
• Coefficient of Restitution


  • Is the ratio of the final velocity to the initial velocity between two objects after their collision
  • It measures how bouncy an object is
  • It is a dimensionless quantity whose value lies between 0 and 1
  • The higher the coefficient of restitution, the bouncier the object
• Law of Conservation of Momentum


  The total momentum of an isolated system of objects remain constant
• Rotation


  • Rotation refers to the motion of a body turning about an axis
  • Where each particle of the body moves along a circular path
• Translational motion


  A type of motion that occurs when an object moves along a path in any of the three dimensions
• Rotational motion


  Defined as the motion of an object around a circular path, in a fixed orbit
• Angular Displacement θ


  It is the angle measured in radians and is defined as the shortest angle between the initial and the final points for a given objects in a circulating path about a fixed point

  
• Angular Velocity ω


  • It is the rate at which angular displacement changes with time
  • The unit for angular velocity is radians per second (rad/s)
• Tangential Velocity


  • Tangential Velocity describes the rate at which an object moves along a circular path
  • It is measured in distance units per unit of time (m/s)

  
• Angular acceleration α


  It is the change of angular velocity per unit time and measured in radians per second squared (rad/s²)
• Center of Mass

  • Is a position defined relative to an object or system of objects
  • Average position of all the parts of the system weighted according to their mass
  • Is a useful reference for calculations in physics
• Geometric Center


  • Also known as Centroid
  • Is the middle part of any object or geometric figure
  • Regularly shaped object with uniform density or object made by similar material throughout
  • Has a center of mass at the object's geometrical center
• Pure Translation


  Body remains in the same orientation
• Translation Plus Rotation


  An object or body rotates around a fixed point
• Inertia


  Is the tendency of an object to resist changes in its state of motion
• Momentum


  • Is a quantity that determine the tendency of moving body to continue moving at constant velocity
  • It is the inertia of moving object
  • Dependent on two variables: mass and velocity
  • Unit: kg.m/s
  • p=mv
• Impulse


  • Is the change in momentum of an object
  • It is a product of the form and time over which the force acts
  • Unit: N.s
• Elastic Collision


  Total kinetic energy is the same before and after the collision
• Inelastic Collision


  Total kinetic energy after the collision is less than the total kinetic energy before the collision
• Newton's Law of Restitution

  When two objects collide, their speed after the collision depends on the material they are made of
• Coefficient of Restitution


  • Is the ratio of the final velocity to the initial velocity between two objects after their collision
  • It measures how bouncy an object is
  • It is a dimensionless quantity whose value lies between 0 and 1
  • The higher the coefficient of restitution, the bouncier the object
• Law of Conservation of Momentum


  • The total momentum of an isolated system of objects remain constant
  • Perfect Elasticity - meaning that the objects will continue moving after colliding
  • Objects stick together - Meaning that the object will not move or move for a little after colliding
• Rotation


  • Rotation refers to the motion of a body turning about an axis
  • Where each particle of the body moves along a circular path
• Translational motion


  A type of motion that occurs when an object moves along a path in any of the three dimensions
• Rotational motion


  Defined as the motion of an object around a circular path, in a fixed orbit
• Angular Displacement θ


  It is the angle measured in radians and is defined as the shortest angle between the initial and the final points for a given objects in a circulating path about a fixed point

  
• Angular Velocity ω


  • It is the rate at which angular displacement changes with time
  • The unit for angular velocity is radians per second (rad/s)
• Tangential Velocity


  • Tangential Velocity describes the rate at which an object moves along a circular path
  • It is measured in distance units per unit of time (m/s)

  
• Angular acceleration α


  It is the change of angular velocity per unit time and measured in radians per second squared (rad/s²)