Unit 6.3 physics.  An object at rest will stay that way unless a force acts on it  An object in motion will continue to move in the same direction and.

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Presentation transcript:

Unit 6.3 physics

 An object at rest will stay that way unless a force acts on it  An object in motion will continue to move in the same direction and speed until a force acts on it.

A force is a push, pull or twist that can cause an object to  Accelerate (increase its speed)  Decelerate (decrease its speed)  Change its direction  Change its shape

 Friction  Air resistance or drag  Buoyancy  Surface tension  Lift  Thrust

 Weight  Electrostatic  Magnet

 Explain why you feel heavier than normal at the bottom of a roller coaster and lighter at the top?  Outline what is the purpose of headrest in a car.  Explain why you should wear seatbelts in a car.

 Force  Contact  Inertia  Buoyancy  Surface Tension  Lift  Thrust  Weight