Science

• Motion is a change in position of any body or object with respect to a fixed reference point.
• A reference point is something that is stationary,
• Motion is the result of two unbalance forces that are either too fast or too slow
• A positive motion is an object that moves at a positive direction. North and East are positive motion
• A negative motion is an object that moves at a negative direction. (West and South are negative directions.)
• Respect means "a reference to a particular thing"
• Relative means "In relation the point of reference or frame of reference"
• Origin is the starting point.
• Relative is the relationship of two objects that can either have a positive or negative motion.
• The two kinds of motion are uniform motion and Non-uniform motion
• Uniform motion if an object moves at constant speed.
• A uniform motion travels equal distances at the same time interval.
• A complete picture of a uniform motion of an object can be shown using a Graphical Representation.
• Non-uniform motion is an object that moves at different speed.
• Non-uniform motion can either speed up or slow down.


  Non uniform motion travels different distances at same time interval.
• A complete picture of a non-uniform motion of an obejct can be shown using a Number Line or Cartesian Plane.
• Linear motion is a motion in which the object moves in a straight line.
• Circular motion is a motion of an object around a central point,
• Vibrational motion is the back and forth motion of an object.
• Elliptical motion is a motion around a central point but not in a perfect circle.(Oblong)
• Projectile motion is an object's motion with an inital and final velocity by the pull of gravity.


  Projectile is the inital velocity while Trajectory is the path followed by a projectile flying/an object moving under the action of given forces.
• Scalar quantities are quantities that describe size or magnitude only. (2 cm, 3 m/s, and 5 kg are examples.)


  Vector quantities are quantities that describe size or magnitude with direction of motion. (2 cm North, 3 m/s East, and 5 kph South are examples.)
• Scalar - Distance, Speed


  Vector - Velocity, Force
• Motions can be identified through measurement.


  Measurement is essential for us to understand the external word.
• Accuracy and precision are two important factors to consider while taking motion measurements.
• Accuracy refers to the degree of how close a measurement is to the true value.


  Precision refers to the degree of repeated or closeness of two or more measurement.
• Signifance numbers are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value.
• Scientific Notation is a method of expressing very large or very small numbers in terms of decimal number between 1 and 10 multiplied by the power of 10.
• RN- LP = Right movement is negative - Left movement is positive.
• Descriptors of motion are concepts used to describe the change of position from a fixed reference point.
• Distance - length of path an object moves.
• Displacement- change of position of an object
• Speed- distance over time travelled by an object
• Velocity- distance with direction travelled by an object.
• Acceleration- change in increasing velocity of an object
• Decelaration- change in decreasing velocity of an object.
• Distance is a scalar quantity which refers how much length or ground of an object has covered. It is the actual path travelled.


  Distance formula:

  d1 + d2+ d3 + d4+...= df
• Displacement is a scalar quantity which refers to how far out of place an object is. It tells how far the object is from the starting point.


  Displacement formula:

  d1 + d2= df

  d1 + d2 + d3 +...= df
• Speed is a scalar quantity(magnitude only) which refers to the rate at which an object moves.


  Formula:

  Speed(v)= distance/time

  V= speed measured in meter per second(mps)/kilometer per hour(kph)

  D= distance measured in meter(m)/kilometer(km)

  T= time measued in second(s)/hour(hr)
• Velocity is a vector quantity(magnitude with direction) which is similar to speed except it includes direction. It describes the displacement travelled per unit of time.


  Velocity formula:

  Velocity= distance/time

  V= velocity measured in meter per second(mps)/kilometer per hour (kph) with direction(North, South, West, East)

  D= displacement measured in meter(m)/kilometer(km) with direction(North, South, West, East)

  T= time measued in second(s) or hour(hr)