Intro to physics

• Distance


  A scalar quantity that refers to how far something has traveled
• Displacement


  A vector quantity that refers to the difference between the final and initial position
• Speed


  A scalar quantity that tells you how fast something is moving, the rate of change of distance
• Velocity


  A vector quantity that tells you how fast and in what direction something is moving
• Acceleration


  A vector quantity that refers to the rate of change of velocity
• According to Newton's first law of motion, an object in motion will continue in motion unless acted upon by a force
• According to Newton's second law of motion, the net force of an object is equal to the mass times the acceleration