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Intro to Electric Forces

Intro to Electric Forces. Physics 12. Unit Circle. Using the Unit Circle with Vector Components. y. A. Ay =Asin θ (positive). θ. x. Ax =Acos θ (positive). Practice Problems 4.5m/s, 27 ° 73N, 73 ° 42m, 48°. Solutions vx =4.0m/s, vy =2.0m/s Fx =21N, Fy =70N dx =28m, dy =31m.

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Intro to Electric Forces

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  1. Intro to Electric Forces Physics 12

  2. Unit Circle

  3. Using the Unit Circle with Vector Components y A Ay=Asinθ (positive) θ x Ax=Acosθ (positive) • Practice Problems • 4.5m/s, 27° • 73N, 73° • 42m, 48° • Solutions • vx=4.0m/s, vy=2.0m/s • Fx=21N, Fy=70N • dx=28m, dy=31m

  4. Using the Unit Circle with Vector Components y A Ay=Asinθ (positive) θ x Ax=Acosθ (negative) • Practice Problems • 7.3m/s, 132° • 3.8N, 114° • 18m, 164° • Solutions • vx=-4.9m/s, vy=5.4m/s • Fx=-1.5N, Fy=3.5N • dx=-17m, dy=5.0m

  5. Using the Unit Circle with Vector Components y • Practice Problems • 62m/s, 192° • 112N, 256° • 23m, 235° • Solutions • vx=-61m/s, vy=-13m/s • Fx=-27.1N, Fy=-109N • dx=-13m, dy=-19m θ Ax=Acosθ (negative) x Ay=Asinθ (negative) A

  6. Using the Unit Circle with Vector Components y • Practice Problems • 41m/s, 303° • 2.6N, 294° • 8.4m, 338° • Solutions • vx=22m/s, vy=-34m/s • Fx=1.1N, Fy=-2.4N • dx=7.8m, dy=-3.1m θ Ax=Acosθ (positive) x A Ay=Asinθ (negative)

  7. W37°S W48°N S21°W S34°E E17°S E42°N N73°E N27°W 217° 132° 249° 304° 343° 42° 17° 117° Angle Conversions

  8. Electroscope • Draw a diagram showing the forces that exist on the leaves of the electroscope when it is placed close to the Van de Graff generator

  9. Pith Ball • Draw a free body diagram of the pith ball when it is brought close to the Van de Graff generator • Do we have the skills to address this situation?

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