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Force & motion notes 2014 2015
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Force & motion notes 2014 2015

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Force and Motion Notes

Force and Motion Notes

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  • 1. When an objectWhen an object’s distance from another’s distance from another object is changing.object is changing. You must have aYou must have a reference pointreference point inin order to determine if something is inorder to determine if something is in motion.motion.
  • 2. Does the sunDoes the sun movemove or the Earth?or the Earth?Don’t copy this slide.
  • 3. TheThe pushpush oror pullpull on anon an object.object.
  • 4. Force between surfaces thatForce between surfaces that resists the movementresists the movement of oneof one surface past another surface.surface past another surface.
  • 5. Friction also existsFriction also exists between an object rollingbetween an object rolling across another surface.across another surface.
  • 6. ForceForce oror attractionattraction between twobetween two objects.objects.
  • 7. Gravity and Motion • The gravitational constant is 9.8 m/s². • Objects fall to Earth at the same acceleration regardless of mass.
  • 8. Measure of the force ofMeasure of the force of attraction between anattraction between an objectobject andand EarthEarth.. AA NewtonNewton is the metric unitis the metric unit used to measure weight.used to measure weight.
  • 9. Many forces act together on anMany forces act together on an object.object. However, it is not alwaysHowever, it is not always easy to determine whateasy to determine what is exerting a force oris exerting a force or what is receiving a force.what is receiving a force.
  • 10. When forces are applied in theWhen forces are applied in the samesame direction, the forces aredirection, the forces are addedadded togethertogether.. Example: paddling a boat in the sameExample: paddling a boat in the same direction helps the boat to go faster.direction helps the boat to go faster.
  • 11. When forces are applied inWhen forces are applied in oppositeopposite directions, subtractdirections, subtract the smaller force to determinethe smaller force to determine the direction.the direction. Example:Example: tug-of-wartug-of-war
  • 12. The resulting force is calledThe resulting force is called thethe net forcenet force..
  • 13. When a net force acts on anWhen a net force acts on an object, the forces areobject, the forces are unbalancedunbalanced.. This causes an object to startThis causes an object to start movingmoving, stop, stop movingmoving, or change, or change directiondirection..
  • 14. Equal forces on an object inEqual forces on an object in opposite directions are calledopposite directions are called balancedbalanced forcesforces.. This does not change anThis does not change an objectobject’s motion.’s motion.

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