     SPANGLER SCIENCE Physics- Force           HOME Textbook Online SCIENCE SCHEDULE GRADES & CURRICULUM UNITS OF STUDY  Enter subhead content here FORCE  (CSS 2)  Force: A push or pull on an object. Giving the object energy to work or change.             *types: gravity, electromagnetic, nuclear, air pressure, thrust, normal,drag                         + others             *2 components: 1) magnitude/strength                         2) direction             *formula: f=m*a   force equals mass times acceleration                         a=f/m    m=f/a             *measurement: Newton (N)- 1kg/m/s/s             Energy: ability to do work or cause change.             Work: (physical work) when force makes something move.                         application of force.              *Balanced Forces: two or more forces that cancel each other out.                         Does not cause change of object’s motion.                         Net force is zero.             *Unbalanced Forces: two or more forces that are not equal.                          Causes the object to accelerate.                         Net force is not zero.             *Net Force: sum of forces upon an object (what’s left).                         -Vectors: arrow to show force and amount of force upon object by                                                 Newton’s Friction: A force that slows motion, or prevent motion.                     An unbalanced force.                      A rubbing between two surfaces creating a resistance to the object in                         motion.             Types of Friction:  static, sliding, rolling, air resistance  Review Inertia: resistance to change. How easy or hard to change object’s momentum.             measured by mass.  Velocity: rate of change of position/displacement  Mass: measurement of matter, space things take up. (kg)  Motion: change in position of object.  The distance object moved from original/reference point.           Enter supporting content here