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FORCE and MOTION

How do objects move? Do all items fall at the same speed? Learn the answers to these and more…. FORCE and MOTION. Partnership for Environmental Education and Rural Health (PEER) http://peer.tamu.edu Texas A&M University October 20, 2008. What is a force?.

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FORCE and MOTION

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  1. How do objects move? Do all items fall at the same speed? Learn the answers to these and more… FORCE and MOTION Partnership for Environmental Education and Rural Health (PEER) http://peer.tamu.edu Texas A&M University October 20, 2008

  2. What is a force? • A force is a push or pull in a specific direction. • Forces can applied in the same or opposite direction. • More than one force can be applied to an object at the same time. • We are interested in the NET force applied. • Net force = Combination of ALL forces acting on an object • The unit for measuring force is the Newton (N). [Named after Isaac Newton]

  3. Examples of force on an object PULL PUSH 30 N 20 N 10 N The NET force = 20 N + 10 N =30 N to the right Force should always include MAGNITUDE and DIRECTION!!

  4. Examples of force on an object 10 N PUSH 10 N PUSH 20 N The NET force = 20 N - 10 N =10 N to the right Force should always include MAGNITUDE and DIRECTION!!

  5. Examples of force on an object 20 N PUSH 0 N PUSH 20 N The NET force = 20 N - 20 N =0 N to the right Force should always include MAGNITUDE and DIRECTION!!

  6. Necessary force information • A force can start an object at rest in motion. • What does ‘at rest’ mean? • Forces can change the shape of an object. • Forces can have no effect at all on an object.

  7. May the force be with you • Force has SIZE (magnitude) and DIRECTION. • Force is measured with a SPRING scale (not a mass balance). • Units are in NEWTONS (N) named after Sir Isaac Newton. SPRING SCALES

  8. There is always more force… • Weight is a measurement of gravitational force on an object. • Weight does NOT equal mass! • How do we measure mass? • An object’s weight depends on the force of gravity at a given location. • Compare the Earth and the moon? • Why do astronauts ‘float’ in space?

  9. Citations and Credit • Image Sources • Microsoft Office Clip Art (Office 2007) • Slide 6 : Image - http://panda.unm.edu/Courses/Price/Phys160/F11-1.jpeg • Slide 7 : Image - http://www.the-planets.com/star-biography/yoda_biography_3.jpg, http://www.heathscientific.net/Portals/0/spring%20scale.jpg, http://www.northerntool.com/images/product/images/19393_lg.jpg, http://www.fromoldbooks.org/Aubrey-HistoryOfEngland-Vol3/pages/vol3-401-Sir-Isaac-Newton/vol3-401-Sir-Isaac-Newton-q75-484x500.jpg • Information Source • Region 4 Educated Solutions, Gateways to Science Grade 6. 2005. pp. 70-78.

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